The value of integral: ∫ 10x^17 e^-x9 dx = -10x^9e^-x^9 - e^-x^9/9 + C, using the substitution u = x⁹.
We need to evaluate the integral:
∫ 10x^17 e^-x9 dx
Let's substitute u = x⁹.
Then,
du = 9x⁸ dx
Therefore, dx = (1/9x⁸) du = u/9x¹⁷ du
Substituting in the original integral:
= ∫ 10x^17 e^-x9 dx
= ∫ 10u e^-u du/9
The antiderivative of 10u e^-u du/9
= -10ue^-u/9 - e^-u/9 + C
We evaluated the integral: ∫ 10x^17 e^-x9 dx = -10x^9e^-x^9 - e^-x^9/9 + C, using the substitution u = x⁹.
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Handwritten submissions willNOT be accepted.
Let A = {a, b, c, d}, B = {a, b, f}, and C = {b, d}. Answer each
of the following questions. Giverea
a) B is a subset of A, b) C is not a subset of A, c) C is a subset of C, and d) C is a proper subset of A.
(a) To determine whether B is a subset of A, we need to check if every element in B is also present in A. In this case, B = {a, b, f} and A = {a, b, c, d}. Since all the elements of B (a, b) are also present in A, we can conclude that B is a subset of A. Thus, B ⊆ A.
(b) Similar to the previous question, we need to check if every element in C is also present in A to determine if C is a subset of A. In this case, C = {b, d} and A = {a, b, c, d}. Since both b and d are present in A, we can conclude that C is a subset of A. Thus, C ⊆ A.
(c) When we consider C ⊆ C, we are checking if every element in C is also present in C itself. Since C = {b, d}, and both b and d are elements of C, we can say that C is a subset of itself. Thus, C ⊆ C.
(d) A proper subset is a subset that is not equal to the original set. In this case, C = {b, d} and A = {a, b, c, d}. Since C is a subset of A (as established in part (b)), but C is not equal to A, we can conclude that C is a proper subset of A. Thus, C is a proper subset of A.
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The complete question is:
Please remember that all submissions must be typeset. Handwritten submissions willNOT be accepted.
Let A = {a, b, c, d}, B = {a, b, f}, and C = {b, d}. Answer each of the following questions. Givereasons for your answers.
(a)Is B ⊆ A?
(b)Is C ⊆ A?
(c)Is C ⊆ C?
(d)Is C a proper subset of A?
You are the manager of a company that manufactures electric chainsaws. Currently
the companv makes 5.000 chainsaws each vear and sells them for $200 each. You suspect that
the company should be able to sell more chainsaws and for a higher price. However, if you raise
the price too high, not as many would sell. The company also doesn't have any storage space so
if the companv makes more chainsaws than they can sell, they will have to pay someone to store
them. Your goal is to maximize profit, that is, the amount of money your company earns minus
the amount our companv spends. It costs the company $95 for the materials to make each chainsaw, and it costs $400,000 each vear to run the electric chainsaw factorv. You conducted market research and found that at the current price of $200 per chainsaw, the company should be able to sell 14,000 units. You also found that if the price was raised to $220 each, the company should be able to sell 11,000 units.
The profit function is: P(x) = [R(x) - C(x)], where R(x) is the revenue function, C(x) is the cost function, and x is the number of units produced.
The company currently makes 5,000 chainsaws each year and sells them for $200 each.It costs the company $95 for the materials to make each chainsaw and costs $400,000 each year to run the electric chainsaw factory.At $200, the company should be able to sell 14,000 units.If the price is raised to $220, the company should be able to sell 11,000 units.To maximize profit, we need to determine the number of units that should be produced and sold. So, we will use the profit function:
P(x) = [R(x) - C(x)]Where R(x) is the revenue function, C(x) is the cost function, and x is the number of units produced.We will calculate the profit using the given data.Cost Function:
C(x) = 400,000 + 95xRevenue Function:If the selling price is $200 per unit, then the revenue function is given by:
R(x) = 200xIf the selling price is $220 per unit, then the revenue function is given by:
R(x) = 220xNow, we will calculate the profit at a selling price of
$200:P(x) = [R(x) - C(x)]
P(x) = [200x - (400,000 + 95x)]
P(x) = [200x - 95x - 400,000]
P(x) = [105x - 400,000]Now, we will calculate the profit at a selling price of $220:
P(x) = [R(x) - C(x)]
P(x) = [220x - (400,000 + 95x)]
P(x) = [220x - 95x - 400,000]
P(x) = [125x - 400,000]The profit function is:
P(x) = [R(x) - C(x)]We want to maximize profit. Maximum profit occurs when the derivative of the profit function equals zero. So, we will differentiate the profit function with respect to x:
P'(x) = 105 at $200
P'(x) = 125 at $220Now, we will check the nature of the stationary point by using the second derivative test:When
x = 5,000,
P'(x) = 105. Therefore, when the selling price is $200, the profit is maximized.When
x = 8,800,
P'(x) = 0. Therefore, when the selling price is $220, the profit is maximized.Now, we will check the concavity of the profit function at x = 8,800 by using the second derivative test:P''(x) < 0
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Exercises on canonical forms Determine the canonical forms (companion and Jordan) for each of
the following transfer functions: (s + 2) (s + 4) (a) H(s) = (s + 1 ) (s + 3)(s+ 5) 5 + 2 (b) H(s ) = s[(s + 1)2 + 4] s +
3 (c). H(s) = (s + 1) 2 ( s + 2) . .
The Jordan form of the transfer function H(s) is
H(s) = J * (s + 2/5)^3
where J is a Jordan matrix.
(a) To determine the canonical forms (companion and Jordan) for the transfer function H(s) = (s + 1)(s + 3)(s + 5) / (5s + 2), we first need to factorize the denominator and numerator.
The transfer function H(s) can be rewritten as:
H(s) = (s + 1)(s + 3)(s + 5) / (5s + 2)
= (s + 1)(s + 3)(s + 5) / 5( s + 2/5)
Now, let's find the roots of the denominator and numerator:
Denominator: 5s + 2 = 0
Solving for s, we get s = -2/5.
Numerator: (s + 1)(s + 3)(s + 5)
The roots of the numerator are s = -1, s = -3, and s = -5.
(a) Companion Form:
The companion form is used for systems with real distinct eigenvalues. The characteristic equation can be obtained by setting the denominator equal to zero and solving for s:
5s + 2 = 0
s = -2/5
Therefore, the characteristic equation is s + 2/5 = 0.
The companion form of the transfer function H(s) is:
H(s) = C * (s + 2/5)
where C is a constant.
(b) Jordan Form:
The Jordan form is used for systems with repeated eigenvalues. Since the denominator has a repeated eigenvalue at s = -2/5, we need to find the highest power of s in the numerator that corresponds to this eigenvalue. In this case, it is (s + 2/5)^3.
The Jordan form of the transfer function H(s) is:
H(s) = J * (s + 2/5)^3
where J is a Jordan matrix.
(c) For part (c), the transfer function H(s) = (s + 1)^2(s + 2) has distinct eigenvalues. Therefore, we can use the companion form for this transfer function.
The companion form of the transfer function H(s) is:
H(s) = C * (s + 1)^2(s + 2)
where C is a constant.
Please note that the specific values of C and the matrices in the canonical forms may vary depending on the conventions used.
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If the slope(m) and a point (x1,y1) of a line are known, the equation of line is given by
A. x - x1 = m(y - y1)
B. y - y1 = m (x - x1)
C. y + y1 = m (x - x1)
D. y - y1 = m (x + x1)
The equation of a line, given the slope (m) and a point (x1, y1) on the line, is represented by the equation B. y - y1 = m(x - x1).
The equation of a line can be determined using the slope-intercept form, which is y = mx + b, where m is the slope of the line. To find the equation of a line when the slope and a point on the line are known, we can substitute the slope (m) and the coordinates of the point (x1, y1) into the slope-intercept form.
In the given options, equation B. y - y1 = m(x - x1) is the correct representation. The equation represents a line with a known slope (m) and passes through the point (x1, y1). The y - y1 part ensures that the line intersects the y-axis at the y-coordinate y1. The m(x - x1) part represents the change in x-coordinate relative to x1, scaled by the slope. Thus, the equation B. y - y1 = m(x - x1) properly describes the relationship between the coordinates on the line and satisfies the given conditions.
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Derive the fourth degree Taylor polynomial for f(x) = x1/3, centered at x = 1.
The fourth-degree Taylor polynomial for f(x) = x^(1/3), centered at x = 1 is given by:
P4(x) = 1 + (1/3)(x - 1) - (2/9)(x - 1)^2 + (10/81)(x - 1)^3 - (80/81)(x - 1)^4.
Given the function f(x) = x^(1/3), we are asked to derive the fourth-degree Taylor polynomial for the function centered at x = 1.
We will use Taylor's formula, which states that for a function f(x), its nth-degree Taylor polynomial centered at x = a is given by:
f(x) = f(a) + f'(a)(x - a) + f''(a)(x - a)^2/2! + f'''(a)(x - a)^3/3! + ... + f^n(a)(x - a)^n/n!
First, let's find the first four derivatives of f(x):
f(x) = x^(1/3)
Applying the power rule of differentiation, we find:
f'(x) = (1/3)x^(-2/3)
Applying the power rule again, we find:
f''(x) = (-2/9)x^(-5/3)
Applying the power rule once more, we find:
f'''(x) = (10/27)x^(-8/3)
Differentiating for the fourth time, we find:
f''''(x) = (-80/81)x^(-11/3)
Now, let's evaluate each derivative at a = 1:
f(1) = 1^(1/3) = 1
f'(1) = (1/3)1^(-2/3) = 1/3
f''(1) = (-2/9)1^(-5/3) = -2/9
f'''(1) = (10/27)1^(-8/3) = 10/27
f''''(1) = (-80/81)1^(-11/3) = -80/81
Substituting these values into the Taylor's formula and truncating at the fourth degree, we get:
f(x) = 1 + (1/3)(x - 1) - (2/9)(x - 1)^2 + (10/81)(x - 1)^3 - (80/81)(x - 1)^4/4!
Therefore, the fourth-degree Taylor polynomial for f(x) = x^(1/3), centered at x = 1 is given by:
P4(x) = 1 + (1/3)(x - 1) - (2/9)(x - 1)^2 + (10/81)(x - 1)^3 - (80/81)(x - 1)^4.
Answer: P4(x) = 1 + (1/3)(x - 1) - (2/9)(x - 1)^2 + (10/81)(x - 1)^3 - (80/81)(x - 1)^4.
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R={c:x is factor of 12} and M ={x:x is factor of 16}
The intersection of sets R and M is {1, 2, 4} since these numbers are factors of both 12 and 16.
To find the intersection of sets R and M, we need to identify the elements that are common to both sets. Set R consists of elements that are factors of 12, while set M consists of elements that are factors of 16.
Let's first list the factors of 12: 1, 2, 3, 4, 6, and 12. Similarly, the factors of 16 are: 1, 2, 4, 8, and 16.
Now, we can compare the two sets and identify the common factors. The factors that are present in both sets R and M are: 1, 2, and 4. Therefore, the intersection of sets R and M is {1, 2, 4}.
In set-builder notation, we can represent the intersection of R and M as follows: R ∩ M = {x : x is a factor of 12 and x is a factor of 16} = {1, 2, 4}.
Thus, the intersection of sets R and M consists of the elements 1, 2, and 4, as they are factors of both 12 and 16.
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Note the complete question is
R={c:x is factor of 12} and M ={x:x is factor of 16}. Then Find R∩M?
Let f(x)=2x²+x−1, find a simplified form of the difference quotient - show your work, one step at a time. f(x+h)−f(x /h)=
The simplified form of the difference quotient (f(x+h) - f(x)) / h for the function f(x) = 2x² + x - 1 is:[(2(x+h)² + (x+h) - 1) - (2x² + x - 1)] / h
Expanding and simplifying the expression step by step, we have:
[(2(x² + 2xh + h²) + x + h - 1) - (2x² + x - 1)] / h
Next, we can remove the parentheses and combine like terms:
[(2x² + 4xh + 2h² + x + h - 1) - 2x² - x + 1] / h
Simplifying further by canceling out terms, we get:
(4xh + 2h² + h) / h
Factoring out h from the numerator, we have:
h(4x + 2h + 1) / h
Finally, we can cancel out h from the numerator and denominator:
4x + 2h + 1
Therefore, the simplified form of the difference quotient is 4x + 2h + 1.
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Mathematical methods of physics II 9. Show that: 1 L,(0) = -1; L0 = =n(n – 1). Ln =
For, 1 L,(0) = -1; L0 = =n(n – 1).
To show that 1 Ln(0) = -1, we need to use the definition of the Laguerre polynomials and their generating function.
The Laguerre polynomials Ln(x) are defined by the equation:
Ln(x) = e^x (d^n/dx^n) (e^(-x) x^n)
To find the value of Ln(0), we substitute x = 0 into the Laguerre polynomial equation:
Ln(0) = e^0 (d^n/dx^n) (e^(-0) 0^n) = 1 (d^n/dx^n) (0) = 0
Therefore, Ln(0) = 0, not -1. It seems there may be an error in the statement you provided.
Regarding the second part of the statement, L0 = n(n - 1), this is not correct either. The Laguerre polynomial L0(x) is equal to 1, not n(n - 1).
Therefore the statement provided contains errors and does not accurately represent the properties of the Laguerre polynomials.
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C++
*** Enter the code in two decimal places ***
Let l be a line in the x-y plane. If l is a vertical line, its
equation is x = a for some real number a. Suppose l is not a
vertical line and its slope
It is any number that can be represented on a number line. It can be positive, negative, rational, or irrational. Include final answers: y = mx + b, x = a, answer cannot be written in numerical form
The solution to the given problem is as follows; If l is a vertical line, its equation is x = a for some real number a. Suppose l is not a vertical line and its slope is "m."
Then the slope-intercept form equation of the line l can be written as;
y = mx + b Here, "b" is the y-intercept of the line "l".
Now if the line "l" passes through a point (x1, y1), then the slope-intercept form equation of the line "l" becomes;
y = m(x - x1) + y1
Given that the line is not a vertical line, that means its slope is not undefined.
Therefore, the slope-intercept form equation of the line "l" can be written as;
y = mx + b
Now, the question is not providing any values for slope "m" or y-intercept "b", so it is not possible to write the equation of the line "l" completely.
However, it can be said that the equation of the line "l" can't be written in the form of x = a as it is a non-vertical line.
Therefore, the answer is;
Code: it is not possible to write the equation of the line "l" completely in the form of y = mx + b or x = a as it is a non-vertical line.
The answer cannot be written in decimal or any other numerical form.
Vertical line: x = a
Real number: It is any number that can be represented on a number line.
It can be positive, negative, rational, or irrational.
Include final answers: y = mx + b, x = a, answer cannot be written in numerical form.
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I need anyone to answer this question quickly.
6. Find the Z-transform and then compute the initial and final values \[ f(t)=1-0.7 e^{-t / 5}-0.3 e^{-t / 8} \]
The Z-transform of [tex]f(t)=1-0.7 e^(-t/5)-0.3 e^(-t/8) is F(z) = 1/(1-0.7z-1-0.3z-2),[/tex]the initial value of f(t) is 0 and the final value of f(t) is 1.
The Z-transform of[tex]f(t)=1-0.7 e^(-t/5)-0.3 e^(-t/8)[/tex]is given by:
F(z) = Z{f(t)} = 1/(1-0.7z-1-0.3z-2)
The initial value of f(t) is given by f(0) = 1 - 0.7 - 0.3 = 0.
The final value of f(t) is given by [tex]lim_{t- > inf} f(t) = lim_{z- > 1} (z-1)F(z)/z = (1-0.7-0.3)/(1-0.7-0.3) = 1.[/tex]
The Z-transform is a mathematical tool used for transforming discrete-time signals into the z-domain, which is a complex plane where the frequency response of the signal can be analyzed. The initial value of a signal is the value of the signal at time t=0, while the final value is the limit of the signal as t approaches infinity.
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Find the rate if the simple interest on 145000. 00 for 4 years is $4500. 00
The rate of simple interest on $145000.00 for 4 years is 7.75%.
We can use the formula for simple interest to solve this problem:
Simple Interest = (Principal * Rate * Time)/100
Where,
Principal = $145000.00
Time = 4 years
Simple Interest = $4500.00
Substituting the given values in the formula, we get:
$4500.00 = (145000.00 * Rate * 4)/100
Simplifying the above equation, we get:
Rate = ($4500.00 * 100)/(145000.00 * 4)
Rate = 0.0775 or 7.75%
Therefore, the rate of simple interest on $145000.00 for 4 years is 7.75%.
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x(2x - 3) = 6
Step 1:
a = x
b=2
C = 3
Plug into quadratic formula: [
Step 2: Show work and solve
Step 3: Solution
X = -1.137
X = 2.637
a solid shape is made from centimetre cubes. Here are the side elevation and front elevation of the shape how many cubes are added
To determine the number of cubes added in the solid shape, we need to analyze the side elevation and front elevation. However, without visual representation or further details, it is challenging to provide an accurate count of the added cubes.
The side elevation and front elevation provide information about the shape's dimensions, but they do not indicate the exact configuration or arrangement of the cubes within the shape. The number of cubes added would depend on the specific design and structure of the solid shape.
To determine the count of cubes added, it would be helpful to have additional information, such as the total number of cubes used to construct the shape or a more detailed description or illustration of the shape's internal structure. Without these specifics, it is not possible to provide a definitive answer regarding the number of cubes added.
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Show that w=∣u∣v+∣v∣u is a vector that bisects the angle between u and v. Let A,B,c be the verticies of a triangle. What is: AB+BC+CA?
The vector w = |u|v + |v|u bisects the angle between vectors u and v. The sum of the lengths of the sides AB, BC, and CA of a triangle is equal to the perimeter of the triangle.
To show that w = |u|v + |v|u bisects the angle between u and v, we need to prove that the angle between w and u is equal to the angle between w and v.
Let's calculate the dot product between w and u:
w · u = (|u|v + |v|u) · u
= |u|v · u + |v|u · u
= |u|v · u + |v|u · u (since v · u = u · v)
= |u|v · u + |v|u²
= |u||v|u · u + |v|u²
= |u||v|(u · u) + |v|u²
= |u||v||u|² + |v|u²
= |u|²|v| + |v|u²
= |u|²|v| + |v||u|² (since |u|² = u²)
= (|u|² + |v||u|) |v|
= |u|(u · u) + |v|(u · u) (since |u|² + |v||u| = |u|(u · u) + |v|(u · u))
= (|u| + |v|) (u · u)
= (|u| + |v|) ||u||²
= (|u| + |v|) ||u||²
= (|u| + |v|) ||u||
= (|u| + |v|) |u|
Similarly, we can calculate the dot product between w and v:
w · v = (|u|v + |v|u) · v
= |u|v · v + |v|u · v
= |u||v|v · v + |v|u · v
= (|u|v · v + |v|u · v) (since v · v = ||v||²)
= (|u| + |v|) (v · v)
= (|u| + |v|) ||v||²
= (|u| + |v|) ||v||
= (|u| + |v|) |v|
From the above calculations, we can see that w · u = (|u| + |v|) |u| and w · v = (|u| + |v|) |v|.
Since u · u and v · v are both positive (as they are dot products with themselves), we can conclude that w · u = w · v if and only if |u| + |v| ≠ 0. Therefore, when |u| + |v| ≠ 0, the vector w bisects the angle between u and v.
Moving on to the second question, the sum of the lengths of the sides AB, BC, and CA of a triangle is equal to the perimeter of the triangle. Therefore, AB + BC + CA represents the perimeter of the triangle.
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This question is about course ( probability ).
02 The town council are thinking of fitting an electronic security system inside head office. They
have been told by manufact
Show transcribed data
02 The town council are thinking of fitting an electronic security system inside head office. They have been told by manufacturers that the lifetime, X years, of the system they have in mind has the p.d.f. f(x) = 3xd 20 - x) for 0
Based on the given p.d.f., there is a 15% probability that the electronic security system will last at least 10 years.
The given probability density function (p.d.f.) for the lifetime of the electronic security system, f(x) = 3x(20 - x) for 0 < x < 20, indicates that the system's lifetime follows a triangular distribution. To answer the question, we need to determine the probability that the system will last at least 10 years.
Since the p.d.f. represents a triangular distribution, the area under the curve between 10 and 20 represents the probability of the system lasting at least 10 years. We can calculate this area using the formula for the area of a triangle.
First, let's find the height of the triangle. The maximum value of the p.d.f. occurs at x = 10 since f(x) = 3x(20 - x) is symmetric about x = 10. Substituting x = 10 into the p.d.f., we get f(10) = 3 * 10 * (20 - 10) = 3 * 10 * 10 = 300.
Next, let's find the base of the triangle, which is the length of the interval from 10 to 20. The base length is 20 - 10 = 10.
Now, we can calculate the area of the triangle using the formula: area = (base * height) / 2 = (10 * 300) / 2 = 1500.
Therefore, the probability that the system will last at least 10 years is 1500/10,000 = 0.15, or 15%.
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Find the coordinates of the center, foci, vertices, and the
equations of the asymptotes of the conic section 25x2 –
16y2 + 250x + 32y + 109 = 0. Graph the results to show
the conic section.
Equations of the asymptotes,
y = ± (√(3673/16) / √(3673/25))(x + 5) + 1
To determine the coordinates of the center, foci, vertices, and equations of the asymptotes of the given conic section, we need to rewrite the equation in a standard form.
Let's start by completing the square for both the x and y terms.
25x^2 – 16y^2 + 250x + 32y + 109 = 0
Rearranging the terms:
25x^2 + 250x – 16y^2 + 32y = -109
Completing the square for the x terms:
25(x^2 + 10x) – 16y^2 + 32y = -109
To complete the square for the x terms, we take half of the coefficient of x (which is 10), square it (which gives 100), and add it inside the parentheses.
However, since we added 25 * 100 inside the parentheses, we need to subtract 25 * 100 outside the parentheses to keep the equation balanced:
25(x^2 + 10x + 25) – 16y^2 + 32y = -109 - 25 * 100
Simplifying:
25(x + 5)^2 – 16y^2 + 32y = -109 - 2500
25(x + 5)^2 – 16(y^2 - 2y) = -3609
Now, let's complete the square for the y terms:
25(x + 5)^2 – 16(y^2 - 2y + 1) = -3609 - 16 * 1
25(x + 5)^2 – 16(y - 1)^2 = -3673
Next, let's divide both sides of the equation by -3673 to make the right side equal to 1:
25(x + 5)^2 / -3673 – 16(y - 1)^2 / -3673 = 1
Now the equation is in standard form: (x - h)^2 / a^2 - (y - k)^2 / b^2 = 1
Comparing this to our equation, we can see that h = -5, k = 1, a^2 = -3673/25, and b^2 = -3673/16.
The center of the conic section is given by (h, k), so the center is (-5, 1).
To find the vertices, we can use the values of a to determine the distance from the center along the x-axis.
Since a^2 = -3673/25, we can take the square root to find
a. However, since the value is negative, we take the absolute value to get a positive value for a. So, a = √(3673/25) ≈ 8.56.
The vertices are located at a distance of a units from the center along the x-axis, so the vertices are (-5 + 8.56, 1) ≈ (3.56, 1) and (-5 - 8.56, 1) ≈ (-13.56, 1).
To find the foci, we can use the values of c, where c^2 = a^2 + b^2.
Since a^2 = -3673/25 and b^2 = -3673/16, we can find c.
c^2 = a^2 + b^2
c^2 = -3673/25 + (-3673/16)
c^2 ≈ 285.46
Taking the square root, we find c ≈ √285.46 ≈ 16.89.
The foci are located at a distance of c units from the center along the x-axis, so the foci are (-5 + 16.89, 1) ≈ (11.89, 1) and (-5 - 16.89, 1) ≈ (-21.89, 1).
To find the equations of the asymptotes, we can use the formula y = ±(b/a)(x - h) + k.
Plugging in the values, we get:
y = ± (√(3673/16) / √(3673/25))(x + 5) + 1
Simplifying:
y = ± (√(3673/16) / √(3673/25))(x + 5) + 1
Now, we can graph the results to show the conic section.
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Find all local minima, local maxima and saddle points of the function f:R2→R,f(x,y)=2/3x3+7x2+24x+2y2+12y−5 Saddle point at (x,y)=___
To find the local minima, local maxima, and saddle points of the function f(x, y) = (2/3)[tex]x^3[/tex] + 7[tex]x^2[/tex] + 24x + 2[tex]y^2[/tex] + 12y - 5, we need to find the critical points and analyze their second-order partial derivatives.
The critical points occur where the partial derivatives equal zero or are undefined. The second-order partial derivatives can help us determine the nature of these critical points. Let's go through the steps:
Step 1: Find the partial derivatives:
∂f/∂x = 2[tex]x^2[/tex] + 14x + 24
∂f/∂y = 4y + 12
Step 2: Set the partial derivatives equal to zero and solve for x and y:
2[tex]x^2[/tex] + 14x + 24 = 0 --> [tex]x^2[/tex] + 7x + 12 = 0
(x + 3)(x + 4) = 0
x = -3 or x = -4
4y + 12 = 0 --> y = -3
So, we have two critical points: (-3, -3) and (-4, -3).
Step 3: Calculate the second-order partial derivatives:
∂²f/∂x² = 4x + 14
∂²f/∂y² = 4
Step 4: Evaluate the second-order partial derivatives at the critical points:
At (-3, -3):
∂²f/∂x² = 4(-3) + 14 = -2
∂²f/∂y² = 4
At (-4, -3):
∂²f/∂x² = 4(-4) + 14 = -2
∂²f/∂y² = 4
Step 5: Determine the nature of the critical points:
At (-3, -3) and (-4, -3), the second-order partial derivatives satisfy the following conditions:
If ∂²f/∂x² > 0 and ∂²f/∂y² > 0, it is a local minimum.
If ∂²f/∂x² < 0 and ∂²f/∂y² < 0, it is a local maximum.
If ∂²f/∂x² and ∂²f/∂y² have different signs, it is a saddle point.
Since ∂²f/∂x² = -2 and ∂²f/∂y² = 4, both critical points (-3, -3) and (-4, -3) have ∂²f/∂x² < 0 and ∂²f/∂y² > 0, which means they are saddle points.
Therefore, the saddle points of the function f(x, y) = (2/3)[tex]x^3[/tex] + 7[tex]x^2[/tex] + 24x + 2[tex]y^2[/tex] + 12y - 5 are (-3, -3) and (-4, -3).
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Get the solution that will lead to the answer key
provided below
Find the transfer function of the given translational mechanical system shown below. 1 C \( (n)-V \cdot(n) /[(n) \) Answer: \[ \frac{\mathrm{X}_{1}(\mathrm{~s})}{\mathrm{F}(\mathrm{s})}=\frac{1}{\math
The sum of the geometric series \((-2/3)^2+(-2/3)^3+(-2/3)^4+(-2/3)^5+(-2/3)^6+...\) is \(\frac{4}{7}\).
(a) To determine if the geometric series \(1+(-3)+(-3)^2+(-3)^3+(-3)^4+...\) converges or diverges, we need to examine the common ratio, which is the ratio between successive terms.
In this case, the common ratio is \(-3\).
For a geometric series to converge, the absolute value of the common ratio must be less than 1.
\(|-3| = 3 > 1\)
Since the absolute value of the common ratio is greater than 1, the geometric series \(1+(-3)+(-3)^2+(-3)^3+(-3)^4+...\) diverges.
The series does not have a finite sum.
(b) Let's consider the geometric series \((-2/3)^2+(-2/3)^3+(-2/3)^4+(-2/3)^5+(-2/3)^6+...\).
The common ratio in this series is \(-2/3\).
To determine if the series converges, we need to check if the absolute value of the common ratio is less than 1.
\(\left|\frac{-2}{3}\right| = \frac{2}{3} < 1\)
Since the absolute value of the common ratio is less than 1, the geometric series \((-2/3)^2+(-2/3)^3+(-2/3)^4+(-2/3)^5+(-2/3)^6+...\) converges.
To find the sum of the series, we can use the formula for the sum of an infinite geometric series:
\[S = \frac{a}{1 - r}\]
where \(a\) is the first term and \(r\) is the common ratio.
In this case, the first term is \((-2/3)^2\) and the common ratio is \(-2/3\).
Plugging these values into the formula, we have:
\[S = \frac{\left(-\frac{2}{3}\right)^2}{1 - \left(-\frac{2}{3}\right)}\]
Simplifying the expression:
\[S = \frac{4}{9 - 2}\]
\[S = \frac{4}{7}\]
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A clothing manufacturer has determined that the cost of producing T-shirts is $2 per T-shirt plus $4480 per month in fixed costs. The clothing manufacturer sells each T-shirt for $30. Find the cost function.
The cost function for the T-shirt manufacturer is C(x) = 2x + 4480.
The cost function in a company is used to determine the total cost of production as the amount of output increases. It's calculated by adding the fixed cost to the variable cost of production.
The variable cost in this scenario is $2 per T-shirt, as given in the problem. Hence, we can find the cost function of the manufacturer's T-shirt production as follows:
Let the cost function be denoted by C(x), where x is the number of T-shirts produced. Then,
C(x) = variable cost + fixed cost (per month)
We are given that the variable cost is $2 per T-shirt, which means if x T-shirts are produced, the total variable cost will be $2x.
Additionally, the fixed cost per month is $4480.Therefore,C(x) = 2x + 4480We know that the manufacturer sells each T-shirt for $30.
We can find the revenue function as:
R(x) = Price per T-shirt * Number of T-shirts soldR(x)
= 30xThe profit function can be calculated as:P(x)
= R(x) - C(x)
= 30x - (2x + 4480)P(x)
= 28x - 4480.
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please solve all these questions correctly.
3. Consider a function \( f(x)=\frac{1}{x(\ln x)^{2}} \), which is continuous on the interval \( [e, e+1] \). Now answer the questions below based on this function: (a) (3 marks) Calculate the exact i
The given function is [tex]$f(x) = \frac{1}{x\ln^2 x}$[/tex], which is continuous on the interval [tex]$[e,e+1]$[/tex]. We need to calculate the exact integral of [tex]$f(x)$[/tex] on the given interval.
The integral of [tex]$f(x)$[/tex] is given by:[tex]$$\int_e^{e+1} \frac{1}{x\ln^2 x}dx$$[/tex]
We can use substitution method to evaluate the above integral.
Let [tex]$u[/tex]= [tex]\ln x$[/tex]. Then, [tex]$du = \frac{1}{x} dx$[/tex] and the integral becomes:
[tex]$$\int_e^{e+1} \frac{1}{x\ln^2 x}dx = \int_1^2 \frac{1}{u^2}[/tex]
[tex]du = -\frac{1}{u}\Bigg\rvert_1^2 = -\frac{1}{\ln 2} + \frac{1}{\ln 1}$$$$= \boxed{\frac{1}{\ln 2}}$$[/tex]
Hence, the exact value of the integral of the given function on the interval [tex]$[e,e+1]$[/tex] is [tex]$\frac{1}{\ln 2}$[/tex],
which is approximately equal to [tex]$1.4427$[/tex](rounded to four decimal places).
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What is the monthly payment for a 10 year 20,000 loan at 4. 625% APR what is the total interest paid of this loan
The monthly payment for a $20,000 loan at a 4.625% APR over 10 years is approximately $193.64. The total interest paid on the loan is approximately $9,836.80.
To calculate the monthly payment, we use the formula for the monthly payment on an amortizing loan. By substituting the given values (P = $20,000, APR = 4.625%, n = 10 years), we find that the monthly payment is approximately $193.64.
To calculate the total interest paid on the loan, we subtract the principal amount from the total amount repaid over the loan term. The total amount repaid is the monthly payment multiplied by the number of payments (120 months). By subtracting the principal amount of $20,000, we find that the total interest paid is approximately $9,836.80.
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14. A loan is made for \( \$ 4800 \) with an APR of \( 12 \% \) and payments made monthly for 24 months. What is the payment amount? What is the finance charge? (4 points). 15. Find the present value
The monthly payment amount is approximately $129.45.
To find the payment amount and finance charge for the loan, we can use the formula for calculating monthly loan payments and finance charges.
The formula to calculate the monthly loan payment amount is given by:
\[ P = \frac{{r \cdot PV}}{{1 - (1+r)^{-n}}} \]
where:
P = monthly payment amount
r = monthly interest rate (APR divided by 12 months and 100 to convert it to a decimal)
PV = present value or loan amount
n = total number of payments
Given:
Loan amount (PV) = $4800
APR = 12%
Monthly payments (n) = 24
To calculate the monthly interest rate (r), we divide the annual percentage rate (APR) by 12 and convert it to a decimal:
\[ r = \frac{{12\%}}{{12 \cdot 100}} = \frac{{0.12}}{{12}} = 0.01 \]
Substituting the values into the formula, we have:
\[ P = \frac{{0.01 \cdot 4800}}{{1 - (1+0.01)^{-24}}} \]
Calculating this equation will give us the monthly payment amount.
To calculate the finance charge, we can subtract the loan amount (PV) from the total amount paid over the loan term (P * n).
Let's calculate these values:
\[ P = \frac{{0.01 \cdot 4800}}{{1 - (1+0.01)^{-24}}} \]
\[ P = \frac{{48}}{{1 - (1+0.01)^{-24}}} \]
\[ P = \frac{{48}}{{1 - 0.62889499777}} \]
\[ P \approx \frac{{48}}{{0.37110500223}} \]
\[ P \approx 129.4532449 \]
To calculate the finance charge, we can subtract the loan amount (PV) from the total amount paid over the loan term:
Total amount paid = P * n
Total amount paid = $129.45 * 24
Total amount paid = $3106.80
Finance charge = Total amount paid - PV
Finance charge = $3106.80 - $4800
Finance charge = $-1693.20
The finance charge is approximately -$1693.20. The negative sign indicates that the borrower will be paying less than the loan amount over the loan term.
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Determine where the function is concave upward and where it is concave downward. (Enter your ansi f(x)=3x4−30x3+x−3 concave upward concave downward
The function [tex]f(x) = 3x^4 - 30x^3 + x - 3[/tex] is concave upward in the intervals (-∞, 0) and (5, +∞), and concave downward in the interval (0, 5).
To determine where the function [tex]f(x) = 3x^4 - 30x^3 + x - 3[/tex] is concave upward or concave downward, we need to analyze the second derivative of the function.
First, let's find the first derivative of f(x) with respect to x:
[tex]f'(x) = 12x^3 - 90x^2 + 1[/tex]
Next, let's find the second derivative by taking the derivative of f'(x):
[tex]f''(x) = 36x^2 - 180x[/tex]
Now, we can determine where the function is concave upward and concave downward by analyzing the sign of the second derivative.
To find the critical points, we set f''(x) = 0 and solve for x:
[tex]36x^2 - 180x = 0[/tex]
36x(x - 5) = 0
This equation gives us two critical points: x = 0 and x = 5.
Next, we evaluate the sign of the second derivative f''(x) in the intervals separated by the critical points:
For x < 0:
We can choose x = -1 for evaluation. Substituting into f''(x):
[tex]f''(-1) = 36(-1)^2 - 180(-1)[/tex]
= 36 + 180
= 216 (positive)
Since f''(x) > 0, the function is concave upward in this interval.
For 0 < x < 5:
We can choose x = 1 for evaluation. Substituting into f''(x):
[tex]f''(1) = 36(1)^2 - 180(1)[/tex]
= 36 - 180
= -144 (negative)
Since f''(x) < 0, the function is concave downward in this interval.
For x > 5:
We can choose x = 6 for evaluation. Substituting into f''(x):
[tex]f''(6) = 36(6)^2 - 180(6)[/tex]
= 1296 - 1080
= 216 (positive)
Since f''(x) > 0, the function is concave upward in this interval.
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What is the critical value(s) of \( y=3 x^{2}-12 x-15 \) ? A. \( x=-1, x=5 \) B. \( x=1, x=-5 \) C. \( x=2 \) D. \( x=-2 \)
The critical value of the function [tex]\(y = 3x^2 - 12x - 15\)[/tex] is [tex]\(x = 2\)[/tex]. To find the critical values, we need to determine the values of [tex]\(x\)[/tex] where the derivative of the function is equal to zero or undefined.
First, we find the derivative of the function with respect to x,
[tex]\(y' = 6x - 12\).[/tex]
Next, we set the derivative equal to zero and solve for x:
[tex]\(6x - 12 = 0\)\\\(6x = 12\)\\\(x = 2\).[/tex]
The critical value is [tex]\(x = 2\)[/tex].
Therefore, the correct answer is option C: [tex]\(x = 2\)[/tex].
To verify this, we can substitute the given values of x into the derivative equation:
For option A: [tex]\(y'(-1) = 6(-1) - 12 = -6 - 12 = -18\)[/tex] (not equal to zero).
For option B: [tex]\(y'(1) = 6(1) - 12 = 6 - 12 = -6\)[/tex] (not equal to zero).
For option D: [tex]\(y'(-2) = 6(-2) - 12 = -12 - 12 = -24\)[/tex] (not equal to zero).
Options A, B, and D are incorrect because they do not represent the values where the derivative is equal to zero.
Therefore, the critical value of the function is [tex]\(x = 2\)[/tex].
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Write a derivative formula for the function.
f(x) = 12.5 (4.7^x)/x^2
f′(x) = _____
The derivative of the function f(x) = 12.5 (4.7^x)/x^2 can be calculated using the product rule and the power rule of differentiation. It can be computed as 12.5 * (4.7^x) * (ln(4.7)/x^2) - 25 * (4.7^x)/(x^3), where ln denotes the natural logarithm.
To find the derivative of the function f(x) = 12.5 (4.7^x)/x^2, we can apply the product rule and the power rule of differentiation. The product rule states that if we have two functions u(x) and v(x), the derivative of their product is given by u'(x)v(x) + u(x)v'(x).
Let's break down the function into its components. We have u(x) = 12.5 (4.7^x) and v(x) = 1/x^2. Applying the power rule, we find v'(x) = -2/x^3.
Using the product rule, we can compute the derivative of f(x) as follows:
f'(x) = u'(x)v(x) + u(x)v'(x)
Applying the power rule to u(x), we have u'(x) = 12.5 * (4.7^x) * ln(4.7), where ln denotes the natural logarithm.
Substituting the values into the derivative formula, we get:
f'(x) = 12.5 * (4.7^x) * ln(4.7)/x^2 + 12.5 * (4.7^x) * (-2/x^3)
Simplifying the expression further, we can write it as:
f'(x) = 12.5 * (4.7^x) * (ln(4.7)/x^2) - 25 * (4.7^x)/(x^3)
Thus, the derivative of the function f(x) = 12.5 (4.7^x)/x^2 is given by f'(x) = 12.5 * (4.7^x) * (ln(4.7)/x^2) - 25 * (4.7^x)/(x^3).
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Let(yn) be a divergent sequence and let (xn) be sequence xn = yn + (-1)^n/n for every nEN1 .
Show that sequence (xn) diverges.
Thank you in advance
The sequence (xn) = yn + (-1)^n/n, where (yn) is a divergent sequence, also diverges.
To prove that the sequence (xn) diverges, we need to show that it does not have a finite limit.
Assuming that (xn) converges to a finite limit L, we can write:
lim(n→∞) xn = L
Since (yn) is a divergent sequence, it does not converge to any finite limit. Let's consider two subsequences of (yn), namely (yn1) and (yn2), such that (yn1) → ∞ and (yn2) → -∞ as n → ∞.
For the subsequence (yn1), we have:
xn1 = yn1 + (-1)^n/n
As n approaches infinity, the term (-1)^n/n oscillates between positive and negative values, which means that (xn1) does not converge to a finite limit.
Similarly, for the subsequence (yn2), we have:
xn2 = yn2 + (-1)^n/n
Again, as n approaches infinity, the term (-1)^n/n oscillates, leading to the divergence of (xn2).
Since we have found two subsequences of (xn) that do not converge to a finite limit, it follows that the sequence (xn) = yn + (-1)^n/n also diverges.
Therefore, the sequence (xn) diverges.
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Let the region R⊂R3 be given by R={(x,y)∈R2∣1≤x≤2,x2≤y≤x2+4} Compute the integral I1=∬R −2(x2+4)/y2 d(x,y)
Let the region R⊂R3 be given by R={(x,y)∈R2∣1≤x≤2,x2≤y≤x2+4}. To compute the integral
[tex]I_1 = \iint_R \frac{-2(x^2 + 4)}{y^2} \, d(x, y)[/tex],
we'll follow these steps: First, we have to sketch the given region R in the plane.
This helps us to identify the limits of integration. (I apologize for the error in the first sentence; it should be "Let the region R⊂R2 be given by R={(x,y)∈R2∣1≤x≤2,x2≤y≤x2+4}")
The region R is a trapezoidal region in the xy-plane. We can write it as: R={(x,y)∈R2∣1≤x≤2, f(x)≤y≤g(x)}, where f(x)=x2 and g(x)=x2+4. Here's the sketch of the region R:
Thus, the integral
[tex]I_1 = \iint_R \frac{-2(x^2 + 4)}{y^2} \, d(x, y)[/tex] is given by:
[tex]I_1 = \int_1^2 \int_{x^2}^{x^2 + 4} \frac{-2(x^2 + 4)}{y^2} \, dy \, dx[/tex]
The limits of integration for y are [tex]x_{2}[/tex] to [tex]x_{2}[/tex]+4, and the limits for x are 1 to 2. Substituting the limits and evaluating the integral gives:
[tex]I_1 &= \int_1^2 \int_{x^2}^{x^2 + 4} \frac{-2(x^2 + 4)}{y^2} \, dy \, dx \\\\&= \int_1^2 (-2) \left( \frac{x^2 + 4}{y} \right) \Bigg|_{y = x^2}^{y = x^2 + 4} \, dx \\\\&= \int_1^2 (-2) \left( \frac{x^2 + 4}{x^2} - \frac{x^2 + 4}{x^2 + 4} \right) \, dx \\\\&= -\frac{8}{3}[/tex]
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According to Remland, which of the following is the primary code we use to signal identity?
The primary code we use to signal identity, according to Remland, is nonverbal communication.
Nonverbal communication refers to the transmission of messages without the use of words. It involves various forms of communication such as facial expressions, body language, gestures, posture, eye contact, and tone of voice. Remland, a researcher in the field of communication, emphasizes the significance of nonverbal cues in signaling identity.
Nonverbal cues play a crucial role in expressing our cultural, social, and personal identities. They can convey information about our emotions, attitudes, status, and affiliations. For example, the way we dress, our choice of accessories, and our body language can communicate aspects of our identity such as our gender, social group, or profession.
Nonverbal communication is particularly powerful because it often operates at an unconscious level and can convey messages that are difficult to express through words alone. These nonverbal signals can shape impressions, establish connections, and influence how others perceive and respond to us.
According to Remland, nonverbal communication is the primary code we use to signal identity. Understanding and interpreting nonverbal cues are essential for effective communication and for navigating social interactions, as they provide valuable insights into the identities and intentions of individuals.
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handwritten please, easy to read, no cursive please thank you so much <3 show all work please!
Image transcription textProblem #2: Students with the last name of F-J: In 2008, the per capita consumption of soft drinks in Country A was reported to be 19.12 gallons. Assume that the per capita consumption of
soft drinks in CountryA is approximately normally distributed, with a mean of 19.12 gallons and a standard deviation of 4 gallons. Please review Section 7.3. CalculateZ and round to two decimal places for each. Then use technology or a table of values from the
cumulative standardized normal distribution to find the probability. Pay attention to each question, as technology calculates area to the left
and the table shows area to the left. Show all work. What is the probability that someone in Country A consumed more than 13 gallons of soft drinks in 2008? (Round to four decimal places as needed.) What is the probability that someone in Country A consumed between 7 and 9 gallons of soft drinks in 2008? (Round to four decimal places as needed.) What is the probability that someone in Country A consumed lessthan 9 gallons of soft drinks in 2008? (Round to four decimal places as needed.) 97% of the people in CountryA consumed less than how many gallons of soft drinks? (Round to four decimal places as needed.) ... Show more
The probability that someone in Country A consumed more than 13 gallons of soft drinks in 2008 is 0.9878. The probability that someone consumed between 7 and 9 gallons is 0.0013. The probability that someone consumed less than 9 gallons is 0.0013. 97% of the people in Country A consumed less than 28.35 gallons of soft drinks.
To calculate the probabilities, we need to standardize the values using the z-score formula:
Z = (X - μ) / σ
where X is the observed value, μ is the mean, and σ is the standard deviation.
For the first question, we calculate the z-score for X = 13:
Z = (13 - 19.12) / 4 = -1.53
To find the probability that someone consumed more than 13 gallons, we need to find the area to the right of -1.53 on the standard normal distribution. Using a table or technology, we find this probability to be 0.9878.
For the second question, we calculate the z-scores for X = 7 and X = 9:
Z1 = (7 - 19.12) / 4 = -3.03
Z2 = (9 - 19.12) / 4 = -2.53
To find the probability that someone consumed between 7 and 9 gallons, we need to find the area between -3.03 and -2.53 on the standard normal distribution. Using a table or technology, we find this probability to be 0.0013.
For the third question, we calculate the z-score for X = 9:
Z = (9 - 19.12) / 4 = -2.53
To find the probability that someone consumed less than 9 gallons, we need to find the area to the left of -2.53 on the standard normal distribution. Using a table or technology, we find this probability to be 0.0013.
Finally, to find the value at which 97% of the people consumed less than, we look for the z-score that corresponds to an area of 0.97 to the left of it. Using a table or technology, we find this z-score to be approximately -1.88. We can then reverse the standardization formula to find the corresponding value of X:
X = (Z * σ) + μ = (-1.88 * 4) + 19.12 = 28.35
Therefore, 97% of the people in Country A consumed less than 28.35 gallons of soft drinks.
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Solve the initial-value problem.
x₁ = x2 + e¹,
x,(0) = 1,
x2=6(1+1)² x, + √t,
x₂ (0) = 2.
the solution to the initial value problem is
[tex]$x_{1} = 24t^{2} + 48 e^{1}t + \sqrt{t} + 2.71828$ and $x_{1}(0) = 3.71828$[/tex]
Given the initial-value problem
[tex]$x_{1} = x_{2} + e^{1}$,$x_{1}(0) = 1$, $x_{2} = 6(1+1)^{2}x_{1} + \sqrt{t}$[/tex],
[tex]$x_{2}(0) = 2$[/tex]
Solving the initial value problem as follows;
Differentiating
[tex]$x_{2} = 6(1+1)^{2}x_{1} + \sqrt{t}$[/tex]
with respect to t,
[tex]$\frac{d x_{2}}{d t} = 6(1+1)^{2} \frac{d x_{1}}{d t} + \frac{1}{2 \sqrt{t}}$[/tex]
Put
[tex]$x_{1} = x_{2} + e^{1}$[/tex]
in the above equation,
[tex]$\frac{d x_{2}}{d t} = 6(1+1)^{2} \frac{d (x_{2} + e^{1})}{d t} + \frac{1}{2 \sqrt{t}}$$\frac{d x_{2}}{d t} = 48(x_{2} + e^{1}) + \frac{1}{2 \sqrt{t}}$[/tex]
Integrating both sides of the equation
[tex]$\frac{d x_{2}}{d t} = 48(x_{2} + e^{1}) + \frac{1}{2 \sqrt{t}}$[/tex]
with respect to t,
[tex]$\int d x_{2} = \int (48(x_{2} + e^{1}) + \frac{1}{2 \sqrt{t}})dt$$x_{2} = 24t^{2} + 48 e^{1}t + \sqrt{t} + C$[/tex]
where C is a constant of integration
Given
[tex]$x_{2}(0) = 2$, $x_{2}(0) = 24(0)^{2} + 48 e^{1} (0) + \sqrt{0} + C$[/tex]
2 = 48 + C => C = -46
Substitute in
[tex]$x_{2} = 24t^{2} + 48 e^{1}t + \sqrt{t} + C$, $x_{2} = 24t^{2} + 48 e^{1}t + \sqrt{t} - 46$[/tex]
Therefore,
[tex]$x_{1} = x_{2} + e^{1} = 24t^{2} + 48 e^{1}t + \sqrt{t} - 46 + e^{1} = 24t^{2} + 48 e^{1}t + \sqrt{t} + 2.71828$.[/tex]
Therefore,
[tex]$x_{1}(0) = 24(0)^{2} + 48 e^{1} (0) + \sqrt{0} + 2.71828 = 3.71828$[/tex]
Hence, the solution to the initial value problem is
[tex]$x_{1} = 24t^{2} + 48 e^{1}t + \sqrt{t} + 2.71828$ and $x_{1}(0) = 3.71828$[/tex]
To know more about initial value problem
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