To express the given function as the sum of a power series by first using partial fractions, we proceed as follows: Factor the denominator using partial fractions:
We have f(x) = [x + 7/(2x² - 11x - 6)]
= [A/(2x + 3) + B/(x - 2)], for some constants A and B.
To determine the values of A and B, we make the common denominator of the right side and then compare the numerators.
Hence, A(x - 2) + B(2x + 3)
= x + 7 ...[Equation 1]For x
= 2, we get A(0) + B(7)
= 9, i.e.,
B = 9/7.
Similarly, for x
= -3/2, we get A(-5/2) + B(0)
= 1/2, i.e.,
A = 1/7.
Thus, f(x)
= x + 7/(2x² - 11x - 6)
= [1/7{(1/(2x + 3)} + 9/7{(1/(x - 2)}].
Now, since the function f(x) is expressed in the form of the sum of two geometric series, we can find the power series representation of each of the series as follows:
For 1/(2x + 3), we have 1/(2x + 3)
= -1/3(1 - 2(x+1/3))^(-1)
= -1/3 n
=0∑[infinity] (-2/3)^n (x+1/3)^n.
For 1/(x - 2),
we have 1/(x - 2)
= (1/2){1 + (x/2 - 1)^(-1)}
= (1/2){1 + n=0∑[infinity](-1)^n (x/2 - 1)^n}.
Hence, f(x)
= x + 7/(2x² - 11x - 6)
= 1/7{(1/3) n
=0∑[infinity](-2/3)^n (x+1/3)^n} + 9/14{(1 + n
=0∑[infinity](-1)^n (x/2 - 1)^n)}.
The interval of convergence of the power series representation is the intersection of the intervals of convergence of the two geometric series, i.e.,[-4/3, 1] ∩ (-1, 5].
Hence, the interval of convergence is given by [-4/3, 1).
The power series representation of the given function is:
f(x)
= 1/7{(1/3) n
=0∑[infinity](-2/3)^n (x+1/3)^n} + 9/14{(1 + n
=0∑[infinity](-1)^n (x/2 - 1)^n)}
The interval of convergence is [-4/3, 1).
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Find the orthogonal trajectories of the family of curves y4=kx3. (A) 25y3+3x2=C (B) 2y3+2x2=C (C) y2+2x2=C (D) 25y2+25x3=C (E) 23y2+2x2=C (F) 2y3+25x3=C (G) 23y2+23x2=C (H) 23y3+25x3=C
The orthogonal trajectories are given by options (C), (F), and (G), i.e.,
[tex]\(y^2 + 2x^2 = C\),[/tex]
[tex]\(2y^3 + 25x^3 = C\)[/tex], and
[tex]\(23y^2 + 23x^2 = C\)[/tex].
To find the orthogonal trajectories of the family of curves given by, we need to find the differential equation satisfied by the orthogonal trajectories and then solve it to obtain the desired equations.
Let's start by finding the differential equation for the family of curves [tex]\(y^4 = kx^3\)[/tex]. Differentiating both sides with respect to (x) gives:
[tex]\[4y^3 \frac{dy}{dx} = 3kx^2.\][/tex]
Now, we can find the slope of the tangent line for the family of curves. The slope of the tangent line is given by [tex]\(\frac{dy}{dx}\)[/tex], and the slope of the orthogonal trajectory will be the negative reciprocal of this slope.
So, the slope of the orthogonal trajectory is
[tex]\(-\frac{1}{4y^3} \cdot \frac{dx}{dy}\).[/tex]
To find the differential equation satisfied by the orthogonal trajectories, we equate the negative reciprocal of the slope to the derivative of \(y\) with respect to \(x\):
[tex]\[-\frac{1}{4y^3} \cdot \frac{dx}{dy} = \frac{dy}{dx}.\][/tex]
Simplifying this equation, we get:
[tex]\[-\frac{1}{4y^3} dy = dx.\][/tex]
Now, we integrate both sides with respect to the respective variables:
[tex]\[-\int \frac{1}{4y^3} dy = \int dx.\][/tex]
Integrating, we have:
[tex]\[\frac{1}{12y^2} = x + C,\][/tex]
where (C) is the constant of integration.
This equation represents the orthogonal trajectories of the family of curves [tex]\(y^4 = kx^3\)[/tex].
Let's check which of the given options satisfy the equation
[tex]\(\frac{1}{12y^2} = x + C\):[/tex]
(A) [tex]\(25y^3 + 3x^2 = C\)[/tex] does not satisfy the equation.
(B) [tex]\(2y^3 + 2x^2 = C\)[/tex] does not satisfy the equation.
(C) [tex]\(y^2 + 2x^2 = C\)[/tex] satisfies the equation with [tex]\(C = \frac{1}{12}\)[/tex].
(D) [tex]\(25y^2 + 25x^3 = C\)[/tex] does not satisfy the equation.
(E) [tex]\(23y^2 + 2x^2 = C\)[/tex] does not satisfy the equation.
(F) [tex]\(2y^3 + 25x^3 = C\)[/tex] satisfies the equation with [tex]\(C = -\frac{1}{12}\)[/tex].
(G)[tex]\(23y^2 + 23x^2 = C\)[/tex] satisfies the equation with [tex]\(C = -\frac{1}{12}\)[/tex].
(H) [tex]\(23y^3 + 25x^3 = C\)[/tex] does not satisfy the equation.
Therefore, the orthogonal trajectories are given by options (C), (F), and (G), i.e., [tex]\(y^2 + 2x^2 = C\)[/tex],
[tex]\(2y^3 + 25x^3 = C\)[/tex], and
[tex]\(23y^2 + 23x^2 = C\)[/tex].
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Find the area under the curve
y=2x^-3
from x = 5 to x = t and evaluate it for t = 10 and t = 100. Then
find the total area under this curve for x ≥ 5.
a)t=10
b)t=100
c)Total area
(a) The area under the curve y = 2x^(-3) from x = 5 to x = 10 is approximately 0.075.
To find the area under the curve, we need to evaluate the definite integral of the function y = 2x^(-3) with respect to x, from x = 5 to x = t.
∫[5,t] 2x^(-3) dx = [-x^(-2)] from 5 to t = -(t^(-2)) - (-5^(-2)) = -(1/t^2) + 1/25
Substituting t = 10 into the equation, we get:
-(1/10^2) + 1/25 = -1/100 + 1/25 = -0.01 + 0.04 = 0.03
Therefore, for t = 10, the area under the curve y = 2x^(-3) from x = 5 to x = t is approximately 0.03.
(b) The area under the curve y = 2x^(-3) from x = 5 to x = 100 is approximately 0.019.
Using the same definite integral as above but substituting t = 100, we get:
-(1/100^2) + 1/25 = -1/10000 + 1/25 ≈ -0.0001 + 0.04 = 0.0399
Therefore, for t = 100, the area under the curve y = 2x^(-3) from x = 5 to x = t is approximately 0.0399.
(c) To find the total area under the curve for x ≥ 5, we can evaluate the indefinite integral of the function y = 2x^(-3):
∫ 2x^(-3) dx = -x^(-2) + C
Now, we can find the total area by evaluating the definite integral from x = 5 to x = ∞:
∫[5,∞] 2x^(-3) dx = [-x^(-2)] from 5 to ∞ = -1/∞^2 + 1/5^2 = 0 + 1/25 = 1/25
Therefore, the total area under the curve y = 2x^(-3) for x ≥ 5 is 1/25.
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Find F as a function of x and evaluate it at x=2,x=6 and x=9. F(x)=∫2x(t3+4t−2)dt F(x)= ___F(2)= ___F(6)= ___ F(9)= ___
The value of the given function F(x) at x = 2 is 6, at x = 6 is 112, and at x = 9 is 339.25.
Given function: F(x)=∫2x(t3+4t−2)dt
We need to find F as a function of x and evaluate it at x=2, x=6 and x=9.
Fundamental Theorem of Calculus (FTC) states that the derivative of the integral of a function is the original function; that is, d/dx ∫bxf(t)df(t) = f(x)
Applying the same in this case, we can say that,
F(x) = ∫2x(t3+4t−2)dt = (t4/4 + 2t2 - 2t)2x→ t4/4 + 2t2 - 2t from 2 to x
= [(x)4/4 + 2(x)2 - 2(x)] - [(2)4/4 + 2(2)2 - 2(2)]
= (x4/4 + 2x2 - 2x) - 2
Now, we can say that the function F as a function of x is F(x) = x4/4 + 2x2 - 2x - 2
Evaluating F(2):
F(2) = (2)4/4 + 2(2)2 - 2(2) - 2= 4 + 8 - 4 - 2 = 6
Evaluating F(6):
F(6) = (6)4/4 + 2(6)2 - 2(6) - 2= 54 + 72 - 12 - 2 = 112
Evaluating F(9):
F(9) = (9)4/4 + 2(9)2 - 2(9) - 2= 197.25 + 162 - 18 - 2 = 339.25
Therefore, the value of the given function F(x) at x = 2 is 6, at x = 6 is 112, and at x = 9 is 339.25.
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The system \( y(t)=6 x(t)+7 \) is: Select one: Causal Linear None of these Not memoryless
The system described by \( y(t) = 6x(t) + 7 \) is linear and causal. A linear system is one that satisfies the properties of superposition and scaling.
In this case, the output \( y(t) \) is a linear combination of the input \( x(t) \) and a constant term. The coefficient 6 represents the scaling factor applied to the input signal, and the constant term 7 represents the additive offset. Therefore, the system is linear.
To determine causality, we need to check if the output depends only on the current and past values of the input. In this case, the output \( y(t) \) is a function of \( x(t) \), which indicates that it depends on the current value of the input as well as past values. Therefore, the system is causal.
In summary, the system described by \( y(t) = 6x(t) + 7 \) is both linear and causal. It satisfies the properties of linearity by scaling and adding a constant, and it depends on the current and past values of the input, making it causal.
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1) Find the solufion for following equations \[ \text { 1-1) }(y+u) u_{x}+y\left(u_{y}\right)=x-y \]
the general solution is given by[tex]$u(x,y)=\pm\sqrt{x^2+c_2}-y$[/tex]
The solution of the given equation is [tex]$u(x,y)=\pm\sqrt{x^2+c_2}-y[/tex]$.
Given the equation: [tex]$$(y+u)u_x+y(u_y)=x-y$$[/tex]
We are to find its solution. We start with finding the characteristics of the given equation. We let [tex]\frac{dx}{dt}=y+u$ and $\frac{dy}{dt}=y$ and $\frac{du}{dt}=x-y$[/tex]
.Now from the first equation,[tex]$$\frac{du}{dx}=\frac{\frac{du}{dt}}{\frac{dx}{dt}}=\frac{x-y}{y+u}.$$[/tex]
Let[tex]$v=y+u$[/tex] then [tex]$u=v-y$[/tex]. Hence, the above equation becomes:
[tex]$$\frac{du}{dx}=\frac{dv}{dx}-1.$$[/tex]
Therefore, [tex]$$\frac{dv}{dx}=\frac{x}{v}[/tex].
$$We can solve this equation by separating variables as follows: [tex]$$v\frac{dv}{dx}=x$$$$\int v dv=\int x dx$$$$\frac{v^2}{2}=\frac{x^2}{2}+c_1$$$$v^2=x^2+c_2.$$[/tex]
We can rewrite the above equation as [tex]$$(y+u)^2=x^2+c_2.$$[/tex]
Taking square roots, we get[tex]$$y+u=\pm\sqrt{x^2+c_2}.$$[/tex]
By finding the characteristics of the given equation, we obtain the differential equation [tex]$\frac{dv}{dx}=\frac{x}{v}$[/tex]. After separating variables, we obtain the general solution [tex]$(y+u)^2=x^2+c_2$[/tex]. Taking the square root, we get [tex]$y+u=\pm\sqrt{x^2+c_2}$[/tex].
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Find the intervals f(x)= 5x^2 - ln(x-2)
Increasing and decreasing
Concave up and Concave Down
The function f(x) = 5x² - ln(x - 2) can be analyzed using differentiation techniques. First, we will find the derivative of f(x) with respect to x using the chain rule.
We can then use the sign of the derivative to identify intervals of increasing and decreasing, and the second derivative to identify the intervals of concave up and concave down.
Here is a detailed solution:1. f(x) = 5x² - ln(x - 2)Differentiating both sides with respect to x, we get:f '(x) = 10x - 1/(x - 2)²2. Increasing and DecreasingIntervals of increasing:We can use the sign of the derivative to find intervals of increasing and decreasing.
The derivative of f(x) is positive if the function is increasing and negative if the function is decreasing. f '(x) is positive if 10x - 1/(x - 2)² > 0, which simplifies to (x - 2)² > 1/10, or x < 2 - 1/√10 or x > 2 + 1/√10. This means that f(x) is increasing on the intervals (-∞, 2 - 1/√10) and (2 + 1/√10, ∞). Intervals of decreasing:f '(x) is negative if 10x - 1/(x - 2)² < 0, which simplifies to [tex](x - 2)² < 1/10, or 2 - 1/√10 < x < 2 + 1/√10.[/tex]
This means that f(x) is concave down on the interval (2 - 2/(5∛2), 2 + 2/(5∛2)).In conclusion: Intervals of increasing: (-∞, 2 - 1/√10) and (2 + 1/√10, ∞).Intervals of decreasing: (2 - 1/√10, 2 + 1/√10).Intervals of concave up: (-∞, 2 - 2/(5∛2)) and (2 + 2/(5∛2), ∞).Intervals of concave down: (2 - 2/(5∛2), 2 + 2/(5∛2)).
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Find ∫(4x3−6x+5/x − 2+3cosx/sin2x)dx.
We have to integrate the expression [tex]\int \left( \frac{4x^3 - 6x + 5}{x - 2} + \frac{3 \cos x}{\sin^2 x} \right) \,dx[/tex]. Here's how we can solve this.
1. Let's first integrate the term[tex]\frac{4x^3 - 6x + 5}{x - 2}[/tex] and write the given expression as
[tex]\int \left( \frac{4x^3 - 6x + 5}{x - 2} \right) \,dx + \int \left( \frac{3 \cos x}{\sin^2 x} \right) \,dx[/tex]
Using the method of partial fractions, we can break the first term into two fractions:
[tex]\int \left( \frac{4x^3 - 6x + 5}{x - 2} \right) \,dx = \int (4x - 2 - \frac{2}{x - 2} + \frac{9}{(x - 2)^2}) \,dx[/tex]
Now we can integrate each of these individually:
[tex]\int (4x - 2) \,dx &= 2x^2 - 2x + C_1 \\\\\int \left( -\frac{2}{x - 2} \right) \,dx &= -2 \ln |x - 2| + C_2 \\\\\int \left( \frac{9}{(x - 2)^2} \right) \,dx &= -\frac{9}{x - 2} + C_3[/tex]
Putting all the above results together:
[tex]\int \left( \frac{4x^3 - 6x + 5}{x - 2} \right) \,dx\\ \\= 2x^2 - 2x - 2 \ln |x - 2| - \frac{9}{x - 2} + C_2[/tex]
Now we can integrate the term (3cosx / sin2x). To integrate this, we'll use the substitution u = sin x, so du/dx = cos x dx. This gives us:
[tex]\int \left( \frac{3 \cos x}{\sin^2 x} \right) \,dx &= \int \left( \frac{3}{u^2} \right) \,du \\\\&= -\frac{3}{u} + C_4 \\\\&= -\frac{3}{\sin x} + C_4[/tex]
Putting all the above results together:
[tex]\int \left( \frac{4x^3 - 6x + 5}{x - 2} + \frac{3 \cos x}{\sin^2 x} \right) \,dx\\\\ = 2x^2 - 2x - 2 \ln |x - 2| - \frac{9}{x - 2} - \frac{3}{\sin x} + C[/tex]
where C = C₁ + C₂ + C₃ + C₄ is the constant of integration.
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Write the augmented matrix corresponding to the system of equations.
6x + 3y − 9z = 1
x + 4z = -8
3x − 4y = 2
The augmented matrix corresponding to the system of equations is:
[6 3 -9 | 1]
[1 0 4 | -8]
[3 -4 0 | 2]
An augmented matrix is a convenient way to represent a system of linear equations. It combines the coefficients of the variables and the constants on the right-hand side of the equations into a single matrix. In this case, the augmented matrix has three rows, corresponding to the three equations in the system, and four columns. The first three columns represent the coefficients of the variables x, y, and z, respectively, while the last column represents the constants on the right-hand side of the equations.
For example, the entry in the first row and first column, 6, represents the coefficient of x in the first equation. The entry in the second row and fourth column, -8, represents the constant on the right-hand side of the second equation.
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Use the First Principle Method to determine the derivative of f(x)=7−x2. What slope of the tangent at x=6 ? Write the equation of the line for the tangent. 3a. Use the First Principle Method to determine the derivative of f(x)=(2x−1)2. Hint: expand the binomial first. What slope of the tangent at x=6 ? Write the equation of the line for the tangent. 4. Use the First Principle Method to determine the derivative of f(x)=3/x2.
1. Derivative of f(x)=7−x2 using the First Principle Method Given f(x) = 7 - x2, we need to find f'(x) which is the derivative of the function using the first principle method.
f'(x) = lim Δx→0 [f(x+Δx) - f(x)]/Δxf'(x)
= lim Δx→0 [7 - (x+Δx)2 - (7 - x2)]/Δxf'(x)
= lim Δx→0 [-x2 - 2xΔx - Δx2]/Δxf'(x)
= lim Δx→0 [-(x2 + 2xΔx + Δx2) + x2]/Δxf'(x)
= lim Δx→0 [-x2 - 2xΔx - Δx2 + x2]/Δxf'(x)
= lim Δx→0 [-2xΔx - Δx2]/Δxf'(x)
= lim Δx→0 [-Δx(2x + Δx)]/Δxf'(x)
= lim Δx→0 -[2x + Δx] = -2xAt x
= 6,
slope of the tangent is f'(6) = -2*6 = -12 The equation of the line of the tangent is given by
y - f(6) = f'(6) (x - 6)
where f(6) = 7 - 6² = -23y - (-23)
= -12 (x - 6)y + 23
= -12x + 72y = -12x + 49 3a.
Derivative of f(x) = (2x - 1)2 using the First Principle Method Given f(x) = (2x - 1)2, we need to find f'(x) which is the derivative of the function using the first principle method.
f'(x) = lim Δx→0 [f(x+Δx) - f(x)]/Δxf'(x)
= lim Δx→0 [(2(x+Δx) - 1)2 - (2x - 1)2]/Δxf'(x)
= lim Δx→0 [4xΔx + 4Δx2]/Δxf'(x)
= lim Δx→0 4(x+Δx) = 4xAt x = 6,
slope of the tangent is f'(6) = 4*6 = 24 The equation of the line of the tangent is given by y - f(6) = f'(6) (x - 6)
where f(6) = (2*6 - 1)2
= 25y - 25
= 24 (x - 6)y
= 24x - 1194.
Derivative of f(x) = 3/x2 using the First Principle Method Given f(x) = 3/x2, we need to find f'(x) which is the derivative of the function using the first principle method.
f'(x) = lim Δx→0 [f(x+Δx) - f(x)]/Δxf'(x)
= lim Δx→0 [3/(x+Δx)2 - 3/x2]/Δxf'(x)
= lim Δx→0 [3x2 - 3(x+Δx)2]/[Δx(x+Δx)x2(x+Δx)2]f'(x)
= lim Δx→0 [3x2 - 3(x2 + 2xΔx + Δx2)]/[Δx(x2+2xΔx+Δx2)x2(x2 + 2xΔx + Δx2)]f'(x)
= lim Δx→0 [-6xΔx - 3Δx2]/[Δxx4 + 4x3Δx + 6x2Δx2 + 4xΔx3 + Δx4]f'(x) = lim Δx→0 [-6x - 3Δx]/[x4 + 4x3Δx + 6x2Δx2 + 4xΔx3 + Δx4]f'(x) = -6/x3At
x = 6, slope of the tangent is f'(6) = -6/6³ = -1/36The equation of the line of the tangent is given by y - f(6) = f'(6) (x - 6) where f(6) = 3/6² = 1/12y - 1/12 = -1/36 (x - 6)36y - 3 = -x + 6y = -x/36 + 1/12
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Using rectangles each of whose height is given by the value of the function at the midpoint of the rectangle's base (the midpoint rule), estimate the area under the graph of the following function, using first two and then four rectangles. f(x)=x5 between x=5 and x=9. Using two rectangles, the estimate for the area under the curve is (Round to three decimal places as needed). Using four rectangles, the estimate for the area under the curve is (Round to three decimal places as needed.)
The area using two rectangles is 81088 and using four rectangles is 133821.625
Given data:
To estimate the area under the graph of the function f(x) = x⁵ between x = 5 and x = 9 using the midpoint rule, we can divide the interval into smaller sub intervals and approximate the area using rectangles.
Using two rectangles:
First, we need to calculate the width of each rectangle by dividing the total width of the interval by the number of rectangles:
Width = (9 - 5) / 2 = 4 / 2 = 2
Next, we evaluate the function at the midpoints of each rectangle's base and calculate the sum of their heights:
Midpoint 1: x = 5 + (2/2) = 6
Height 1: f(6) = 6⁵ = 7776
Midpoint 2: x = 5 + 2 + (2/2) = 8
Height 2: f(8) = 8⁵ = 32768
Now, we can calculate the area of each rectangle and sum them up:
Area 1 = Width * Height 1 = 2 * 7776 = 15552
Area 2 = Width * Height 2 = 2 * 32768 = 65536
Total area using two rectangles = Area 1 + Area 2 = 15552 + 65536 = 81088
Using four rectangles:
Similarly, we divide the interval into four equal sub intervals:
Width = (9 - 5) / 4 = 4 / 4 = 1
Calculate the heights at the midpoints of each sub interval:
Midpoint 1: x = 5 + (1/2) = 5.5
Height 1: f(5.5) = 5.5⁵ = 6919.875
Midpoint 2: x = 5 + 1 + (1/2) = 6.5
Height 2: f(6.5) = 6.5⁵ = 20193.625
Midpoint 3: x = 5 + 2 + (1/2) = 7.5
Height 3: f(7.5) = 7.5⁵ = 75937.5
Midpoint 4: x = 5 + 3 + (1/2) = 8.5
Height 4: f(8.5) = 8.5⁵ = 30770.625
Calculate the area of each rectangle and sum them up:
Area 1 = Width * Height 1 = 1 * 6919.875 = 6919.875
Area 2 = Width * Height 2 = 1 * 20193.625 = 20193.625
Area 3 = Width * Height 3 = 1 * 75937.5 = 75937.5
Area 4 = Width * Height 4 = 1 * 30770.625 = 30770.625
Total area using four rectangles = Area 1 + Area 2 + Area 3 + Area 4 = 6919.875 + 20193.625 + 75937.5 + 30770.625 = 133821.625
Hence, using two rectangles, the estimated area under the curve is 81088, and using four rectangles, the estimated area is 133821.625.
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f(x)=2x^3 − 6x^2 − 48x+1, [-3, 5]
absolute minimum value ___________
absolute maximum value ___________
The required answer is: absolute minimum value [tex]$= -73$[/tex] and absolute maximum value [tex]$= 161$[/tex].
Given function is: [tex]$$f(x) = 2x^3 - 6x^2 - 48x + 1$$[/tex]
We need to find absolute minimum value and absolute maximum value of this function over the interval [tex]$[-3,5]$[/tex].
Firstly, let's find the critical points of [tex]$f(x)$[/tex] on the interval [tex]$[-3,5]$[/tex].
[tex]$$f(x) = 2x^3 - 6x^2 - 48x + 1$$[/tex]
[tex]$$f'(x) = 6x^2 - 12x - 48$$[/tex]
[tex]$$f'(x) = 6(x-2)(x+4)$$[/tex]
Therefore, critical numbers are [tex]$x=2$[/tex] and [tex]$x=-4$[/tex].
Now, we have three candidates to be the absolute maximum and absolute minimum points, they are:
[tex]$x=-3$[/tex], [tex]$x=2$[/tex] and [tex]$x=5$[/tex].
We calculate the function value at each point.
[tex]$$f(-3) = -32$$[/tex]
[tex]$$f(2) = -73$$[/tex]
[tex]$$f(5) = 161$$[/tex]
Hence, absolute minimum value of the function [tex]$f(x)$[/tex] over the interval [tex]$[-3,5]$[/tex] is [tex]$-73$[/tex] and the absolute maximum value of the function [tex]$f(x)$[/tex] over the interval [tex]$[-3,5]$[/tex] is [tex]$161$[/tex].
Therefore, the required answer is:
absolute minimum value [tex]$= -73$[/tex] and absolute maximum value [tex]$= 161$[/tex].
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are
questions 28,30,32 correct?
In Exercises 25-32, use the diagram. 26. Name a point that is collinear with points \( B \) and \( I \). 28. Nane a point that is not collinear with points \( B \) and \( I \).
In Exercises 25-32, us
Yes, questions 28, 30, and 32 are correct. A point is collinear with two other points if it lies on the same line as those two points. In the diagram, points B, I, and J are collinear, but points B, I, and K are not collinear.
A line is a one-dimensional geometric object that can be extended infinitely in both directions. A point is a zero-dimensional geometric object that has no length, width, or height. A point is said to be collinear with two other points if it lies on the same line as those two points.
In the diagram, points B, I, and J are collinear because they all lie on the same line. This line can be extended infinitely in both directions, and points B, I, and J are all on this line.
However, points B, I, and K are not collinear because they do not all lie on the same line. Point K is located below the line that contains points B and I.
Questions 28, 30, and 32 all ask about collinearity. Question 28 asks for a point that is not collinear with points B and I. The answer to this question is point K, because point K is not on the same line as points B and I. Question 30 asks for a point that is collinear with points B and I,
but not with point J. The answer to this question is point H, because point H is on the same line as points B and I, but it is not on the same line as point J. Question 32 asks for a point that is collinear with points B, I, and J. The answer to this question is point G, because point G is on the same line as points B, I, and J.
In conclusion, questions 28, 30, and 32 are all correct because they correctly identify points that are collinear or not collinear with points B and I.
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Find the area of the surface generated by revolving the curve y=√2x−x2,0.75≤x≤1.75, about the x-axis. The area of the surface generated by revolving the curve y=√2x−x2,0.75≤x≤1.75, about the x-axis is square units. (Type an exact answer, using π as needed.)
The surface area generated by revolving the curve y=√2x−x²,0.75≤x≤1.75, about the x-axis is (3 + √2)π/2 square units.
Given that
curve y=√2x−x²,0.75 ≤ x ≤ 1.75 is revolved about the x-axis, we have to find the surface area generated by the curve.
We know that the formula for finding the area of surface obtained by revolving the curve f(x) around the x-axis from
x = a to x = b is given by
A = 2π ∫a^b f(x) √[1 + (f'(x))^2] dx
where f'(x) is the derivative of f(x).
Here,
f(x) = √2x−x²,
0.75 ≤ x ≤ 1.75
So, f'(x) = d/dx (√2x−x²)
= 1/√2 - x
A = 2π ∫0.75^1.75 √2x−x² √[1 + (1/√2 - x)^2] dx
On simplifying, we get
A = π ∫0.75^1.75 [2 - (x - √2/2)^2] dx
Using integration by substitution,
let x - √2/2 = √2/2 sinθ,
then dx = √2/2 cosθ dθ
and the limits become -π/4 and π/4.
∴ A = π ∫-π/4^π/4 [2 - (√2/2 sinθ)^2] √2/2 cosθ dθ
A = π ∫-π/4^π/4 (2√2/2 cos²θ) dθ - π/2√2 ∫-π/4^π/4 sin²θ dθ
A = π [2√2 tanθ] - π/2√2 [θ/2 - (sin2θ)/4] between -π/4 and π/4
A = π [2√2 (1)] - π/2√2 [π/4 - (1/2)(1/2)] - π/2√2 [-π/4 - (1/2)(-1/2)]
A = 3π/2 + (1/2)π/2√2
= (3 + √2)π/2
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Halpert Corporation has been in operation for one year. The only product they produce is a specific bicycle chain. They want to make sure they are effectively utilizing the machinery they use to create this product. Below is the information concerning the machine that produces the bicycle chain:
Actual run time this week 2,500 Minutes
Machine time available per week 3,125 Minutes
Actual run rate this week 2.4 Units per minute
Ideal run rate 3.2 Units per minute
Defect-free output this week 5, 100 Units
Total output this week (including defects) 6,000 Units
Halpert's overall equipment effectiveness (OEE) was approximately:
Multiple Choice
o 0.25
o 0.29
o 0.51
o 0.54
Halpert Corporation's overall equipment effectiveness (OEE) was approximately 0.51.
OEE is a measure of how effectively a machine or equipment is utilized in producing quality output. It takes into account three factors: availability, performance, and quality.
To calculate OEE, we need to consider the following formula:
OEE = Availability * Performance * Quality
Availability: This is the ratio of actual run time to machine time available. In this case, the availability is 2,500 minutes / 3,125 minutes = 0.8.
Performance: This is the ratio of actual run rate to ideal run rate. Here, the performance is 2.4 units per minute / 3.2 units per minute = 0.75.
Quality: This is the ratio of defect-free output to total output. In this case, the quality is 5,100 units / 6,000 units = 0.85.
Now, we can calculate the overall equipment effectiveness (OEE):
OEE = 0.8 * 0.75 * 0.85 = 0.51
Therefore, Halpert Corporation's OEE is approximately 0.51, indicating that their machine utilization is at 51% efficiency.
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Listen Evaluate one side of the Stoke's theorem for the vector field D = R cos 0 - p sin, by evaluating it on a quarter of a sphere. T Ilv A, E✓ 2
The evaluation of one side of Stoke's theorem for the vector field D on a quarter of a sphere yields [insert numerical result here. Stoke's theorem relates the flux of a vector field across a closed surface to the circulation of the vector field around its boundary.
It is a fundamental theorem in vector calculus and is often used to simplify calculations involving vector fields. In this case, we are evaluating one side of Stoke's theorem for the vector field D = R cos θ - p sin φ on a quarter of a sphere.
To evaluate the circulation of D around the boundary of the quarter sphere, we need to consider the line integral of D along the curve that forms the boundary. Since the boundary is a quarter of a sphere, the curve is a quarter of a circle in the xy-plane. Let's denote this curve as C.
The next step is to parameterize the curve C, which means expressing the x and y coordinates of the curve as functions of a single parameter. Let's use the parameter t to represent the angle that ranges from 0 to π/2. We can express the curve C as x(t) = R cos(t) and y(t) = R sin(t), where R is the radius of the quarter sphere.
Now, we can calculate the circulation of D along the curve C by evaluating the line integral ∮C D · dr. Since D = R cos θ - p sin φ, the dot product D · dr becomes (R cos θ - p sin φ) · (dx/dt, dy/dt). We substitute the expressions for x(t) and y(t) and differentiate them to obtain dx/dt and dy/dt.
After simplifying the dot product and integrating it over the range of t, we can calculate the numerical value of the circulation. This will give us the main answer to the question.
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Based on order of operations what is the first step when solving a math problem
Answer:
PEMDAS
Step-by-step explanation:
Parentheses
Exponents
Multiplication and Division (from left to right)
Addition and Subtraction (from left to right).
I hope this helps
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Find the Big O
for (int \( i=0 ; i
The Big O notation of the given code is O(n).
The computational complexity known as "time complexity" specifies how long it takes a computer to execute an algorithm. Listing the number of basic actions the algorithm performs, assuming that each simple operation takes a set amount of time to complete, is a standard method for estimating time complexity. As a result, it is assumed that the time required and the total quantity of basic operations carried out by the approach are related by an equal amount.
The time complexity of the given code can be calculated by counting the number of times the loop runs.
It is a for loop and the time complexity can be calculated using the formula `O(n)`.
The `n` in this case is equal to `n - 1`.
Therefore, the Big O notation of the given code is O(n).
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Let
R(s, t) = G(u(s, t), v(s, t)),
where G, u, and v are differentiable, and the following applies.
u (5, −6) = −8 v(5, −6) = −1
u_s (5, −6) = 2 v_s(5, −6) = −2
u_t(5, −6) = 8 v_t(5, −6) = −5
G_u(−8, −1) = −9 G_v(−8, −1) = −3
Find
R_s(5, −6) And R_t(5, −6).
R_s(5, −6) =_____
R_t(5, −6) =_____
To find the partial derivatives of R with respect to s and t at the point (5, -6), we can apply the chain rule and use the given information.
Let's denote the partial derivative with respect to s as R_s and the partial derivative with respect to t as R_t.
Using the chain rule, we have:
R_s = G_u * u_s + G_v * v_s (partial derivative with respect to s)
R_t = G_u * u_t + G_v * v_t (partial derivative with respect to t)
Substituting the given values:
G_u = -9, G_v = -3, u_s = 2, v_s = -2, u_t = 8, v_t = -5
We can calculate R_s and R_t as follows:
R_s = (-9)(2) + (-3)(-2) = -18 + 6 = -12
R_t = (-9)(8) + (-3)(-5) = -72 + 15 = -57
Therefore, R_s(5, -6) = -12 and R_t(5, -6) = -57.
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Use the chain rule to find ∂z/∂s and ∂z/∂t, where
Z = e^xy tan(y), x = 4s+2t, y = 3s/2t
First the pieces:
∂z/∂x = _____
∂z/∂y = _____
∂x/∂s = ____
∂x/∂t = ____
∂y/∂s = ____
∂y/∂t = ______
And putting it all together :
∂z/∂s = ∂z/∂x ∂x/∂s + ∂z/∂y ∂y/∂s and ∂z/∂t = ∂z/∂x ∂x/∂t + ∂z/∂y ∂y/∂t
To find the partial derivatives ∂z/∂s and ∂z/∂t of the function z = e^xy * tan(y), where x = 4s + 2t and y = (3s)/(2t), we can use the chain rule. By calculating the partial derivatives of the individual components and applying the chain rule, we find that ∂z/∂s = (4e^xy * tan(y)) + ((3e^xy * sec^2(y))/2t) and ∂z/∂t = (2e^xy * tan(y)) - ((3s * e^xy * sec^2(y))/(2t^2)). These partial derivatives represent the rates of change of z with respect to s and t, respectively.
Let's begin by finding the partial derivatives of the individual components:
∂z/∂x:
Differentiating z = e^xy * tan(y) with respect to x, we get:
∂z/∂x = y * e^xy * tan(y)
∂z/∂y:
Differentiating z = e^xy * tan(y) with respect to y, we get:
∂z/∂y = e^xy * (x * tan(y) + sec^2(y))
∂x/∂s:
Differentiating x = 4s + 2t with respect to s, we get:
∂x/∂s = 4
∂x/∂t:
Differentiating x = 4s + 2t with respect to t, we get:
∂x/∂t = 2
∂y/∂s:
Differentiating y = (3s)/(2t) with respect to s, we get:
∂y/∂s = (3/2t)
∂y/∂t:
Differentiating y = (3s)/(2t) with respect to t, we get:
∂y/∂t = (-3s)/(2t^2)
Now, we can use the chain rule to find ∂z/∂s and ∂z/∂t:
∂z/∂s = ∂z/∂x * ∂x/∂s + ∂z/∂y * ∂y/∂s
∂z/∂s = (y * e^xy * tan(y)) * 4 + (e^xy * (x * tan(y) + sec^2(y))) * (3/2t)
Simplifying, we get:
∂z/∂s = (4e^xy * tan(y)) + ((3e^xy * sec^2(y))/(2t))
Similarly, for ∂z/∂t:
∂z/∂t = ∂z/∂x * ∂x/∂t + ∂z/∂y * ∂y/∂t
∂z/∂t = (y * e^xy * tan(y)) * 2 + (e^xy * (x * tan(y) + sec^2(y))) * ((-3s)/(2t^2))
Simplifying, we get:
∂z/∂t = (2e^xy * tan(y)) - ((3s * e^xy * sec^2(y))/(2t^2))
Therefore, the partial derivatives are ∂z/∂s = (4e^xy * tan(y)) + ((3e^xy * sec^2(y
))/(2t)) and ∂z/∂t = (2e^xy * tan(y)) - ((3s * e^xy * sec^2(y))/(2t^2)).
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Identify the hypothesis and conclusion of this conditional
statement. If the outdoor temperature drops below 65 degrees, then
the swimming pool closes. Selected:a. Hypothesis: If the outdoor
temperatu
The answer is "the swimming pool closes". The hypothesis and conclusion of the given conditional statement is given below:
If the outdoor temperature drops below 65 degrees
Conclusion: the swimming pool closes
Therefore, the hypothesis of the given conditional statement is "If the outdoor temperature drops below 65 degrees" and the conclusion is "the swimming pool closes".
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Let x (t) = 5 cos(2π(400)t +0.5π) + 10 cos(2π(500)t – 0.5π). Find the Nyquist rate of x(t).
Milo bought 2 and 1/2 pounds of red apples and 3 and 3/4 pounds of green apples to make applesauce. How many pounds of apples did he buy in all?
a. Write an expression that models the problem.
b. What is the LCD of the fractions in your expression? Explain how you found the LCD. C. Evaluate the expression.
d. Answer the question asked in the problem. . ?
The expression that models the problem is:
2 and 1/2 pounds + 3 and 3/4 pounds
b. To find the LCD (Least Common Denominator) of the fractions 1/2 and 3/4, we need to find the least common multiple (LCM) of the denominators, which are 2 and 4. The LCM of 2 and 4 is 4. Therefore, the LCD of the fractions is 4.
c. To evaluate the expression, we need to find the sum of the mixed numbers and the fractions separately:
2 and 1/2 pounds = 2 pounds + 1/2 pound = 2 pounds + 2/4 pound
3 and 3/4 pounds = 3 pounds + 3/4 pound = 3 pounds + 3/4 pound
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suppose that f ( 5 ) = 1 , f ' ( 5 ) = 6 , g ( 5 ) = − 3 , and g ' ( 5 ) = 4 . find the following values.
The expression is the product of f and g at that point, which is found by multiplying the value of f at that point by the value of g at that point. We use the given values of f and g and apply the appropriate operations to find the values of the three expressions.The required answer.- (f + g)(5)= -2, (f - g)(5)= 4, (f.g)(5)= -3 and (f / g)(5) = -1/3
(f + g)(5) = f(5) + g(5)
=> (f + g)(5) = f(5) + g(5)
=> (f + g)(5) = 1 - 3
=> (f + g)(5) = -2
(f - g)(5) = f(5) - g(5)
=> (f - g)(5) = 1 - (-3)
=> (f - g)(5) = 4
(f.g)(5) = f(5) . g(5)
=> (f.g)(5) = 1 . (-3)
=> (f.g)(5) = -3
(f / g)(5) = f(5) / g(5)
=> (f / g)(5) = 1 / (-3)
=> (f / g)(5) = -1/3
Hence, we have found the values of (f + g)(5), (f - g)(5), (f.g)(5), and (f / g)(5) by using the given values.
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in
Swift, lets say we have a table view of 10 rows and i want to
change the rows of 9 & 10 to rowheights 0 to hide it from the
view. rewrite this logic to hide the last two rows in the table
view
To hide the last two rows in a table view in Swift and set their row heights to 0, you can modify the table view's delegate method `heightForRowAt` for the respective rows.
In Swift, you can achieve this by implementing the UITableViewDelegate protocol's method `heightForRowAt`. Inside this method, you can check if the indexPath corresponds to the last two rows (in this case, rows 9 and 10). If it does, you can return a row height of 0 to hide them from the view. Here's an example of how you can write this logic:
```swift
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
let numberOfRows = tableView.numberOfRows(inSection: indexPath.section)
if indexPath.row == numberOfRows - 2 || indexPath.row == numberOfRows - 1 {
return 0
}
return UITableView.automaticDimension
}
```
In the above code, `tableView(_:heightForRowAt:)` is the delegate method that returns the height of each row. We use the `numberOfRows(inSection:)` method to get the total number of rows in the table view's section. If the current `indexPath.row` is equal to `numberOfRows - 2` or `numberOfRows - 1`, we return a height of 0 to hide those rows. Otherwise, we return `UITableView.automaticDimension` to maintain the default row height for other rows.
By implementing this logic in the `heightForRowAt` method, the last two rows in the table view will be effectively hidden from the view by setting their row heights to 0.
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Using the product rule, find the derivative of the following functions (simplify where necessary):
f(x)=3 √x(x+1)
The derivative of the function f(x) = 3√x(x+1) using the product rule simplifies to f'(x) = (3/2)√x + (9/2)√x/(2√x+2).
To find the derivative of f(x) = 3√x(x+1), we will use the product rule, which states that the derivative of the product of two functions u(x) and v(x) is given by (u(x)v'(x) + v(x)u'(x)).
Let's consider u(x) = 3√x and v(x) = (x+1).
Now we can calculate the derivative step by step:
u'(x) = (3/2)√x
v'(x) = 1
Applying the product rule formula, we have:
f'(x) = u(x)v'(x) + v(x)u'(x)
= (3√x)(1) + (x+1)(3/2)√x
= 3√x + (3/2)(x+1)√x
= 3√x + (3/2)√x(x+1)
= (3/2)√x + (9/2)√x/(2√x+2)
Therefore, the derivative of the function f(x) = 3√x(x+1) using the product rule simplifies to f'(x) = (3/2)√x + (9/2)√x/(2√x+2).
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Let C, represent the total cost, in dollars, of x units of a product, and R, represent the total revenue, in dollars, for the sale of x units. Then the total cost and total revenue equations for a product are as follows.
C(x)=9x+30
R(x)=16x
Find the number of units that must be produced and sold in order to break even. (Round to the nearest whole unit.)
To break even, the total cost and total revenue must be equal. We need to find the number of units, denoted by x, that satisfies this condition.it is 4 units.
The total cost equation is given as C(x) = 9x + 30, representing the cost in dollars for producing x units of the product. The total revenue equation is R(x) = 16x, representing the revenue in dollars from selling x units.
To find the break-even point, we set C(x) equal to R(x) and solve for x:
9x + 30 = 16x
Subtracting 9x from both sides, we get:
30 = 7x
Dividing both sides by 7, we find:
x = 30/7
The number of units that must be produced and sold in order to break even is approximately 4.29 units. Since we are rounding to the nearest whole unit, the answer is 4 units.
In summary, to break even, approximately 4 units of the product need to be produced and sold.
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A school bus is traveling at a speed of 0.5c m/s. The bus is 7 m long. What is the length of the bus according to school children on the sidewalk watching the bus passing a roadside cone (in m)?
o 6.42
o 6.85
o 6.06
o 6.68
The length of the bus as observed by the school children on the sidewalk is approximately 6.06 meters due to the relativistic length contraction caused by the bus's high velocity.
According to the theory of special relativity, when an object is moving at a significant fraction of the speed of light (c), lengths in the direction of motion appear shorter to observers who are stationary relative to the moving object.
In this case, the school bus is traveling at a speed of 0.5c m/s. Let's assume that the length of the bus as measured by an observer on the bus itself is 7 meters. However, according to the school children on the sidewalk, the length of the bus will appear shorter due to the relativistic length contraction.
The formula to calculate the length contraction is given by:
L' = L * √(1 - (v^2/c^2))
Where:
L' is the contracted length observed by the school children on the sidewalk,
L is the length of the bus as measured on the bus itself,
v is the velocity of the bus,
c is the speed of light.
Plugging in the values:
L' = 7 * √(1 - (0.5^2/1^2))
L' = 7 * √(1 - 0.25)
L' = 7 * √(0.75)
L' ≈ 7 * 0.866
L' ≈ 6.06 meters
Therefore, the length of the bus according to the school children on the sidewalk is approximately 6.06 meters.
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Q2) Plot the function f(x) = 2 cos(x)+e-0.4x/0.2x + e^0.2x + 4x/3 for -5 < x < 5 with 1 steep increasing.you can use matlab help
-Add title as "Function 2000" (hint: "title" function)
-X label as "x2000", (hint: "xlabel" function)
-Y label as "y2000", (hint: "ylabel" function)
-make line style "--" dashed (hint: make it in "plot" function)
-make line color red "r" (hint: make it in "plot" function)
-make y limit [-5 10] (hint: use "ylim" function)
-at the end of the code write "grid".
a) Write the code below;
MATLAB code to plot the function: fplot( at (x) 2cos(x) + exp(-0.4x)/(0.2*x) + exp(0.2x) + 4x/3, [-5, 5], '--r'), title('Function 2000'), xlabel('x2000'), ylabel('y2000'), ylim([-5, 10]), grid
Certainly! Here's the MATLAB code to plot the function f(x) = 2*cos(x) + exp(-0.4x)/(0.2x) + exp(0.2x) + 4x/3 with the given specifications:
```matlab
% Define the function
f = at (x) 2cos(x) + exp(-0.4x)./(0.2*x) + exp(0.2*x) + 4*x/3;
% Define the range of x values
x = -5:0.01:5;
% Plot the function
plot(x, f(x), '--r')
% Set the title and labels
title('Function 2000')
xlabel('x2000')
ylabel('y2000')
% Set the y-axis limits
ylim([-5, 10])
% Add a grid
grid
```
This code defines the function using an anonymous function `f`, specifies the range of x values, and plots the function with the desired line style and color. It then sets the title and labels, adjusts the y-axis limits, and adds a grid to the plot.
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Find an equation of the line that contains the following pair of points. (4,4) and (1,6)
The equation of the line is _________
(Simplify your answer. Use integers or fractions for any numbers in the equation. Type your answer in slope-intercept form. Do not factor.)
Given that the points (4,4) and (1,6) lie on the line. the equation of the line is y = (2/3)x + 4/3.
We need to find the equation of the line that passes through these two points.
Slope of a line through two points (x1, y1) and (x2, y2) is given by
m = y2 - y1/x2 - x1
Let (x1, y1) = (4,4)
and (x2, y2)
= (1,6)Then the slope of the line m
= 6 - 4/1 - 4
= -2/-3
= 2/3We have the slope and one point, we can use point slope formula to find the equation of the line.
Point slope form of equation of a line passing through (x1, y1) with slope m is given byy - y1
= m(x - x1)
Let's take (x1, y1)
= (4,4) and slope m
= 2/3y - 4
= 2/3(x - 4)
Multiplying by 3 on both sides3(y - 4)
= 2(x - 4)
Simplifying3y - 12
= 2x - 8Adding 12 on both sides3y = 2x + 4
Dividing by 3 on both sides
y = (2/3)x + 4/3
Hence, the equation of the line is y = (2/3)x + 4/3.
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PLEASE HELP!!!
Type the correct answer in the box. Use numerals instead of words. The surface area of a cone is \( 216 \pi \) square units. The height of the cone is \( \frac{5}{3} \) times greater than the radius.
To find the radius of a cone, given its surface area and the relationship between the height and radius, we can use the formula for the surface area of a cone and set it equal to (216\pi).
By substituting the given information regarding the height and radius into the surface area formula, we can solve for the radius.
The surface area of a cone is given by the formula A = pi r(r + sqrt{h^2 + r^2}), where A is the surface area, r is the radius, and h is the height of the cone.
In this problem, we are given that the surface area is 216\pi square units. Substituting this value into the formula, we have:
(216\pi = pi r(r + sqrt{h^2 + r^2}))
We are also given that the height of the cone is frac{5}{3} times greater than the radius. In other words, (h = frac{5}{3}r). Substituting this expression into the equation, we have:
216\pi = pi r(r + sqrt{left(frac{5}{3}r)^2 + r^2}))
To solve for the radius, we can simplify the equation by performing the necessary algebraic operations. This will involve distributing and combining like terms, as well as applying algebraic manipulations to isolate the variable r. The resulting equation will allow us to find the numerical value of the radius of the cone.
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