Given the following phasors, please rewrite the corresponding currents and currents in the time domain. [total 5 points, each is 2.5 points) a) I=22120°A, i(t) =? b) V = 220230°V, v(t) =?

The property of real numbers illustrated by each equation depends on the specific equation. However, some common properties of real numbers include the commutative property, associative property, distributive property, identity property, and inverse property.

The property of real numbers illustrated by each equation depends on the specific equation. However, there are several properties of real numbers that can be applied to equations:

About property of real numbers here:

https://brainly.com/question/30245592

#SPJ11

Therefore, the minimum value of the function is -10.

To find the minimum value of the function [tex]f(x, y, z) = x^2 - 4x + y^2 - 6y + z^2 - 2z + 5[/tex], subject to the constraint x + y + z = 3 using Lagrange multipliers, we set up the following system of equations:

∇f = λ∇g

g = x + y + z - 3

Taking the partial derivatives of f with respect to x, y, and z:

∂f/∂x = 2x - 4

∂f/∂y = 2y - 6

∂f/∂z = 2z - 2

And the partial derivatives of g with respect to x, y, and z:

∂g/∂x = 1

∂g/∂y = 1

∂g/∂z = 1

Setting up the equations:

2x - 4 = λ

2y - 6 = λ

2z - 2 = λ

x + y + z = 3

From the first three equations, we can solve for x, y, z in terms of λ:

x = (λ + 4)/2

y = (λ + 6)/2

z = (λ + 2)/2

Substituting these expressions into the fourth equation:

(λ + 4)/2 + (λ + 6)/2 + (λ + 2)/2 = 3

Simplifying the equation:

3λ + 12 = 6

Solving for λ:

λ = -2

Substituting λ = -2 back into the expressions for x, y, and z:

x = (λ + 4)/2

= ( -2 + 4)/2

= 1

y = (λ + 6)/2

= ( -2 + 6)/2

= 2

z = (λ + 2)/2

= ( -2 + 2)/2

= 0

Thus, the minimum value of f(x, y, z) subject to the constraint x + y + z = 3 is [tex]f(1, 2, 0) = 1^2 - 4(1) + 2^2 - 6(2) + 0^2 - 2(0) + 5 = -10.[/tex]

To know more about minimum value,

https://brainly.com/question/32520848

#SPJ11

Given equations are as follows: x - y + z = 2x + y + z = 62x - y + 3z = 6 We can write the given system of linear equations in matrix form as AX = B,

where A = [[1, -1, 1], [1, 1, 1], [2, -1, 3]],

X = [x, y, z] and B = [2, 6, 6].

Using the adjoint method, we first need to find the adjoint of the matrix A.

We can then use it to find the inverse of A, which can be used to solve for X in the equation AX = B.

1. Find the adjoint of A

The adjoint of A, denoted by adj(A), is the transpose of the matrix of cofactors of A.

The cofactor of each element [tex]a_{ij[/tex] of A is [tex](-1)^{(i+j)[/tex]times the determinant of the matrix obtained by deleting the ith row and jth column of A. We can represent the matrix of cofactors as C(A).

We can then write adj(A) = [tex]C(A)^T[/tex].

Calculating the cofactors of A, we have:

C(A) = [[4, -2, -2], [2, 2, -2], [2, -2, 4]]

Taking the transpose of C(A), we have:

[tex]C(A)^T[/tex] = [[4, 2, 2], [-2, 2, -2], [-2, -2, 4]]

Therefore, adj(A) = [[4, 2, 2], [-2, 2, -2], [-2, -2, 4]]

2. Find the inverse of A Using the formula [tex]A^{-1[/tex]= adj(A) / det(A), we can find the inverse of A.

The determinant of A can be found using the rule of Sarrus as shown below.

det(A) = 1(1 * 3 - 1 * -1) - (-1)(1 * 3 - 1 * 2) + 1(1 * -1 - 1 * 2)= 4

Multiplying adj(A) by 1/det(A), we have:

[tex]A^{-1[/tex] = adj(A) / det(A)

= [[4, 2, 2], [-2, 2, -2], [-2, -2, 4]] / 4

= [[1, 0.5, 0.5], [-0.5, 0.5, -0.5], [-0.5, -0.5, 1]]

3. Solve for XMultiplying both sides of AX = B by [tex]A^{-1[/tex], we have X =[tex]A^{-1[/tex] B.

Substituting the values of [tex]A^{-1[/tex] and B, we have:

X = [[1, 0.5, 0.5], [-0.5, 0.5, -0.5], [-0.5, -0.5, 1]] [tex][2, 6, 6]^T[/tex]=[tex][5, 1, 2]^T[/tex]

Therefore, the solution of the given system of linear equations is x = 5, y = 1, and z = 2.

To more about  linear equations visit:

https://brainly.com/question/32634451

#SPJ11

The given system of equations are:x − y + z = 2x + y + z = 62x − y + 3z = 6

We can express this system of equations in matrix form as follows:

Now, we need to find the inverse of the coefficient matrix. The adjoint method can be used to find the inverse of a matrix. In this method, we first need to find the adjoint of the matrix and then divide it by the determinant of the matrix. Let's find the inverse of the coefficient matrix using the adjoint method.To find the adjoint of the matrix, we need to find the transpose of the matrix of cofactors. Let's first find the matrix of cofactors.

Now, we take the transpose of the matrix of cofactors to get the adjoint of the matrix.Now, we can find the inverse of the coefficient matrix by dividing the adjoint of the matrix by the determinant of the matrix. The determinant of the matrix is:

Now, we can divide the adjoint of the matrix by the determinant of the matrix to find the inverse of the matrix.Now, we can find the values of x, y and z by multiplying the inverse of the coefficient matrix with the matrix of constants.Let the matrix of constants be B. Then, we have:Therefore, the values of x, y and z are: x = 1, y = 2 and z = 3.Hence, the solution of the given system of equations is x = 1, y = 2 and z = 3.

To know more about matrix , visit:

https://brainly.com/question/27929071

#SPJ11

The value of "ω" for which the function returns a 3 dB response in the expression 20log(|1 + jwt|) is approximately 15245.67.

In the given function, 20log(|1 + jwt|), the term inside the logarithm represents a complex number with a real part of 1 and an imaginary part of jwt. To determine the value of "ω" for a 3 dB response, we need to find the frequency at which the magnitude of the complex number is 3 dB lower than its maximum value.

In decibels, a reduction of 3 dB corresponds to a power ratio of 0.5 (or an amplitude ratio of √0.5). Converting this to a magnitude ratio, we have 0.5 = |1 + jwt|/|1 + jwt|max.

Squaring both sides of the equation, we get 0.25 = |1 + jwt|²/|1 + jwt|max².

Expanding the square and rearranging the terms, we have 0.25 = (1 + jwt)(1 + j(-wt))/|1 + jwt|max².

Simplifying further, we get 0.25 = (1 - wt²)/|1 + jwt|max².

Since the real part of the complex number is 1, we have |1 + jwt|max = 1.

Substituting T = 1.3606746 x [tex]10^(^-^4^)[/tex] for wt, we get [tex]0.25 = (1 - w^2T^2)/1.[/tex]

Rearranging the equation, we have[tex]1 - w^2T^2 = 0.25.[/tex]

Solving for w, we find [tex]w^2T^2 = 0.75.[/tex]

Taking the square root of both sides, we obtain wT = √0.75.

Dividing both sides by T, we get w = √0.75/T.

Substituting the given value of T = 1.3606746 x [tex]10^(^-^4^)[/tex], we have w ≈ √0.75/(1.3606746 x [tex]10^(^-^4^)[/tex]).

Evaluating the expression, we find w ≈ 15245.67.

Therefore, the value of "ω" for which the function returns a 3 dB response is approximately 15245.67.

Learn more about Function

brainly.com/question/30721594

#SPJ11

The linear approximation for the function f(x, y) = √(4x + y) about the point (3, 2) is f(x, y) ∼ √13 + (x - 3)√13/6 + (y - 2)√13/26

To find the linear approximation for the function f(x, y) = √(4x + y) about the point (3, 2), we can use the two-dimensional Taylor series. The linear approximation involves the first-order partial derivatives of the function.

First, we find the partial derivatives of f(x, y) with respect to x and y:

∂f/∂x = (1/2)(4x + y)^(-1/2)(4)

∂f/∂y = (1/2)(4x + y)^(-1/2)(1)

Next, we evaluate these derivatives at the point (3, 2) to get the values of the derivatives at that point:

∂f/∂x(3, 2) = 2

∂f/∂y(3, 2) = 1

Using the linear approximation formula, the linear approximation for f(x, y) about the point (3, 2) is given by:

f(x, y) ≈ f(3, 2) + ∂f/∂x(3, 2)(x - 3) + ∂f/∂y(3, 2)(y - 2)

Substituting the values, we have:

f(x, y) ≈ √13 + 2(x - 3) + (y - 2)

Simplifying further, we get:

f(x, y) ≈ √13 + 2(x - 3) + (y - 2)

Therefore, the linear approximation for the function f(x, y) = √(4x + y) about the point (3, 2) is f(x, y) ∼ √13 + (x - 3)√13/6 + (y - 2)√13/26.

Learn more about linear approximation here:

brainly.com/question/1621850

#SPJ11

It is incorrect to state that a × (b. c) = a × b . a × c. The distributive property cannot be used to change the left-hand side of the equation to the right-hand side

a. (b + c) = a . b + a . c is the distributive property and is a true statement. It can be justified using distributive property of multiplication over addition which is:

a(b + c) = ab + ac.

b. a x (b + c) = a × b + a x c is a false statement.

It is similar to the previous one, but it is incorrect because there is no x symbol in the distributive property.

This could be justifiable by using the distributive property of multiplication over addition which is:

a(b + c) = ab + ac.

c. a x (b. c) = a x b . a x c is also a false statement.

The statement is false because of the following reasons;

Firstly, the equation is multiplying two products together.

Secondly, a × b x c = (a × b) × c.

Therefore, it is incorrect to state that a × (b. c) = a × b . a × c.

The distributive property cannot be used to change the left-hand side of the equation to the right-hand side.

To know more about multiplication visit:

https://brainly.com/question/11527721

#SPJ11

To minimize the cost of the box with a volume of 15 cubic feet, the length of the base (x) should be 1.5 feet and the height of the side (z) should be 2.5 feet.

Let's denote the length of the base of the box as x, the width of the base as y, and the height of the side as z. We are given that the volume of the box is 15 cubic feet, so we have the equation: Volume = x * y * z = 15

To minimize the cost of the box, we need to minimize the surface area, which is the sum of the areas of the top, bottom, and sides. The cost of the top and bottom metal is $3 per square foot, and the cost of the side metal is $6 per square foot.

The surface area of the box can be expressed as:

Surface Area = 2(x * y) + 4(x * z)

We want to minimize the cost, which is the product of the surface area and the corresponding cost per square foot. Let's assume the cost of the top and bottom metal is C1 and the cost of the side metal is C2. Then the cost function can be written as: Cost = C1 * (2(x * y)) + C2 * (4(x * z))

Given the cost per square foot for the top and bottom metal is $3, and the cost per square foot for the side metal is $6, we can rewrite the cost function as: Cost = 6xy + 12xz

Using the volume equation and the fact that y = x (since the top and bottom are both squares), we can express z in terms of x:

x * x * z = 15

z = 15 / (x^2)

Substituting this expression for z into the cost function, we have:

Cost = 6xy + 12xz

Cost = 6x^2 + 12x(15 / (x^2))

Cost = 6x^2 + 180 / x

To minimize the cost, we take the derivative of the cost function with respect to x and set it equal to zero: d(Cost)/dx = 12x - 180 / (x^2) = 0

Solving this equation, we find x = 1.5. Substituting this value back into the volume equation, we can solve for z: 1.5 * 1.5 * z = 15

z = 2.5

Therefore, the dimensions that minimize the cost of the box with a volume of 15 cubic feet are: length of the base (x) = 1.5 feet and height of the side (z) = 2.5 feet.

LEARN MORE ABOUT volume here: brainly.com/question/28058531

#SPJ11

The approximate value of y(3) using Heun's method with a step size of h = 1.5 is 5.72578125.

The approximate value of y(3) using Ralston's method with a step size of h = 1.5 is 4.4223046875.

Heun's Method:

Heun's method, also known as the Improved Euler method, is a numerical approximation technique for solving ordinary differential equations.

Given the differential equation: [tex]\(2y + 1.1\frac{dy}{dx} = 5x\)[/tex] with the initial condition [tex](y(0) = 2.1\)[/tex] , we can rewrite it as:

[tex]\(\frac{dy}{dx} = \frac{5x - 2y}{1.1}\)[/tex]

Step 1:

x0 = 0

y0 = 2.1

Step 2:

x1 = x0 + h = 0 + 1.5 = 1.5

k1 = (5x0 - 1.1y0) / 2 = (5 * 0 - 1.1 * 2.1) / 2 = -1.155

y1 predicted = y0 + h  k1 = 2.1 + 1.5  (-1.155) = 0.8175

Step 3:

k2 = (5x1 - 1.1 y1) / 2 = (5 x 1.5 - 1.1 x 0.8175) / 2 = 2.15375

y1  = y0 + h x (k1 + k2) / 2 = 2.1 + 1.5 x ( (-1.155) + 2.15375 ) / 2 = 1.538125

Now, we repeat the above steps until we reach x = 3.

Step 4:

x2 = x1 + h = 1.5 + 1.5 = 3

k1 = (5x1 - 1.1 y1 ) / 2 = (5 x 1.5 - 1.1 x 1.538125) / 2 = 1.50578125

y2 predicted = y1 + h x k1 = 1.538125 + 1.5 x 1.50578125 = 4.0703125

Step 5:

k2 = (5x2 - 1.1 y2 predicted) / 2

= (5 x 3 - 1.1 x 4.0703125) / 2

= 4.3592578125

y2 corrected = y1 corrected + h   (k1 + k2) / 2 = 1.538125 + 1.5 x (1.50578125 + 4.3592578125) / 2 = 5.72578125

The approximate value of y(3) using Heun's method with a step size of h = 1.5 is 5.72578125.

Ralston's method

dy/dx = (5x - 1.8y) / 2

Now,

Step 1:

x0 = 0

y0 = 3.5

Step 2:

x1 = x0 + h = 0 + 1.5 = 1.5

k1 = (5x0 - 1.8y0) / 2 = (5 x 0 - 1.8 x 3.5) / 2 = -3.15

y1 predicted = y0 + h x k1 = 3.5 + 1.5 x (-3.15) = -2.025

Step 3:

k2 = (5x1 - 1.8 y1 predicted) / 2 = (5 x 1.5 - 1.8 (-2.025)) / 2 = 3.41775

y1 corrected = y0 + (h / 3)  (k1 + 2 x k2) = 3.5 + (1.5 / 3) (-3.15 + 2 x 3.41775) = 1.901625

Now, we repeat the above steps until we reach x = 3.

The approximate value of y(3) using Ralston's method with a step size of h = 1.5 is 4.4223046875.

Learn more about Ralston's method here:

https://brainly.com/question/32513954

#SPJ4

1.1.1. The base of the given number system is 6. 1.1.2. To carry out addition in this number system, perform the addition operation using the given symbols.

1.1.1. The base of a number system determines the number of unique symbols used to represent values. In this case, the given number system uses the symbols 0, 1, 2, 3, 4, 5, and 6, indicating that it is a base-6 number system.

1.1.2. To perform addition in this number system, follow the usual addition rules, but with the given symbols. Start by adding the rightmost digits, and if the sum exceeds 6, subtract the base (6) and carry over the extra value to the next place value. Repeat this process for each digit, including any carryovers.

For example, if we want to add 35 and 41 in this number system, we start by adding the rightmost digits: 5 + 1 = 6. Since 6 is equal to the base, we write 0 in the sum and carry over 1. Moving to the left, we add the next digits: 3 + 4 + 1 (carryover) = 0 (carryover 1). Finally, we add the leftmost digits: 1 + 0 (carryover) = 1. Thus, the result is 106 in this base-6 number system.

It is important to note that when the sum reaches or exceeds the base (6 in this case), we subtract the base and carry over the excess value.

Learn more about NUMBER SYSTEMS: brainly.com/question/17200227

#SPJ11

The lengths of the sides are equal, the opposite sides are parallel, and the angles between adjacent sides are all right angles, which proves that the given quadrilateral EFGH is a square.

Given is a quadrilateral EFGH with vertices E(-2, 3), F(1, 6), G(4, 3) and H(1, 0).

We need to prove this is a square.

To prove that quadrilateral EFGH is a square, we need to show that all four sides are equal in length and that the angles between adjacent sides are all right angles (90 degrees).

Let's go step by step:

Calculate the lengths of the sides:

Side EF:

[tex]\sqrt{(x_F - x_E)^2 + (y_F - y_E)^2} = \sqrt{(1 - (-2))^2+ (6 - 3)^2}\\\\= \sqrt{(3^2+ 3^2)} \\\\= 3\sqrt{2[/tex]

Side FG:

[tex]\sqrt{[(x_G - x_F)^2 + (y_G - y_F)^2]} \\\\ = \sqrt{[(4 - 1)^2 + (3 - 6)^2]} \\\\= \sqrt{(3^2 + 3^2)} \\\\= 3\sqrt{2[/tex]

Side GH:

[tex]\sqrt{[(x_H - x_G)^2 + (y_H - y_G)^2]} \\\\ = \sqrt{[(1 - 4)^2 + (0 - 3)^2]} \\\\= \sqrt{(3^2 + 3^2)} \\\\= 3\sqrt2[/tex]

Side HE:

[tex]\sqrt{[(x_E - x_H)^2 + (y_E - y_H)^2] } \\\\ = \sqrt{[(-2 - 1)^2 + (3 - 0)^2]} \\\\= \sqrt{(3^2 + 3^2)} \\\\= 3\sqrt2[/tex]

Calculate the slopes of the sides:

EF: (6 - 3) / (1 - (-2)) = 1

FG: (3 - 6) / (4 - 1) = -1

GH: (0 - 3) / (1 - 4) = 1

HE: (3 - 0) / (-2 - 1) = -1

Since the slopes of opposite sides are negative reciprocals of each other, EF and GH are parallel, and FG and HE are parallel.

Calculate the angles between adjacent sides:

Angle EFG: This is the angle between EF and FG.

The slopes of EF and FG are 1 and -1, so the lines are perpendicular, and the angle is 90 degrees.

Angle FGH: This is the angle between FG and GH.

The slopes of FG and GH are -1 and 1, so the lines are perpendicular, and the angle is 90 degrees.

Angle GHE: This is the angle between GH and HE.

The slopes of GH and HE are 1 and -1, so the lines are perpendicular, and the angle is 90 degrees.

Angle HEF: This is the angle between HE and EF.

The slopes of HE and EF are -1 and 1, so the lines are perpendicular, and the angle is 90 degrees.

Conclusion:

All four sides are equal in length (3√2 units), and all four angles are right angles (90 degrees).

Therefore, quadrilateral EFGH satisfies the properties of a square, and it can be concluded that EFGH is indeed a square.

Learn more about quadrilateral click;

https://brainly.com/question/29934291

#SPJ12

Complete question is attached.

We can calculate the square root of 32, which is approximately 5.657.

The distance formula is given by:

\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]

To express the answer in exact form, we leave the square root as it is and do not round any values.

To express the answer in approximate form, we can substitute the given values and calculate the result, rounding to a specific decimal place.

For example, if we have the coordinates (x1, y1) = (2, 4) and (x2, y2) = (6, 8), we can calculate the distance as follows:

\[ d = \sqrt{(6 - 2)^2 + (8 - 4)^2} \]

\[ d = \sqrt{4^2 + 4^2} \]

\[ d = \sqrt{16 + 16} \]

\[ d = \sqrt{32} \]

In exact form, the distance is represented as \( \sqrt{32} \).

In approximate form, we can calculate the square root of 32, which is approximately 5.657.

Thus, the approximate form of the distance is 5.657 (rounded to three decimal places).

to learn more about square root.

https://brainly.com/question/29286039

#SPJ11

Answer:

j2c 7h72rhc2r7c r27h c7h2rc2r

The cost function is given by C(x) = (-x³/360000) + 33.33.  The fixed costs are $ 33.33.

Given that the marginal average cost of producing x digital sports watches is given by the function C(X), where Cˉ(x) is the average cost in dollars and

 Cˉ′(x)=-x²/1200;

Cˉ(100)=25.

To find the average cost function, integrate the Cˉ′(x) and add an arbitrary constant c, as follows:

Cˉ′(x) = dC/dx

⇒ dC/dx = -x²/1200.

Integrating both sides w.r.t x, we get

C = ∫dC/dx dx

⇒ C = ∫(-x²/1200) dx.

Integrate the above integral using power rule, we get

C(x) = (-x³/360000) + c.

Now, substituting

Cˉ(100)=25, we have

25 = (-100³/360000) + c

⇒ c = 25 + (100³/360000)

⇒ c = 33.33

Therefore, the average cost function is given by

C(x) = (-x³/360000) + 33.33.

Now, to find the cost function, take the integral of the average cost function from 0 to x, as follows:

C(x) = ∫C'(x) dx.

Substituting the value of C'(x) in the above integral, we get:

C(x) = ∫(-x²/1200) dx.

Using power rule, the above integral can be integrated as

C(x) = (-x³/360000) + c.

Substituting c = 33.33, we get:

C(x) = (-x³/360000) + 33.33

Know more about the cost function

https://brainly.com/question/2292799

#SPJ11

The sum of the infinite terms for the given geometric sequence is (B) -32.

To find the sum of an infinite geometric series, we need to determine if the series converges or diverges. For a geometric series to converge, the absolute value of the common ratio (r) must be less than 1.

In this case, the common ratio (r) can be found by dividing any term by its preceding term:

r = 24 / (-48) = -1/2

Since the absolute value of -1/2 is less than 1 (|r| < 1), the series converges.

The sum of an infinite geometric series can be calculated using the formula:

S = a / (1 - r)

Where "a" is the first term of the series and "r" is the common ratio.

Plugging in the values, we have:

S = (-48) / (1 - (-1/2))

 = (-48) / (1 + 1/2)

 = (-48) / (3/2)

 = (-48) * (2/3)

 = -32

Therefore, the sum of the infinite terms for the given geometric sequence is (B) -32.

To know more about geometric, visit:

https://brainly.com/question/29170212

#SPJ11

A state space representation for the system can be obtained using the Partial Fraction Expansion (PFE) method. A state feedback controller can be designed to achieve 20.79% overshoot and a settling time of 4 seconds, with the third closed loop pole at s = -6. The range of the third closed loop pole should be chosen to approximate the system's response to that of a second-order system. The closed-loop transfer function of the system can be determined. The steady-state error due to a unit step input can be calculated.

(a) To obtain a state space representation using PFE, we express the open-loop transfer function G(s) in partial fraction form, and then determine the matrices A, B, C, and D for the state space representation.

(b) To design a state feedback controller for 20.79% overshoot and a settling time of 4 seconds, we can use pole placement techniques. By placing the third closed-loop pole at s = -6, we can calculate the desired feedback gain matrix K to achieve the desired response.

(c) The range of the third closed-loop pole can be determined by analyzing the desired system response characteristics. Generally, for a second-order system approximation, the damping ratio and natural frequency are crucial. By choosing appropriate values for the third closed-loop pole, we can approximate the system response to that of a second-order system.

(d) The closed-loop transfer function of the system can be obtained by combining the open-loop transfer function G(s) with the feedback controller transfer function.

(e) The steady-state error due to a unit step input can be calculated using the final value theorem. By evaluating the limit of the closed-loop transfer function as s approaches zero, the steady-state error can be determined.

LEARN MORE ABOUT Partial Fraction Expansion here: brainly.com/question/31707489

#SPJ11

Simplifying the equation, we find:-5(dx/dt) = 12,which gives us:

dx/dt = -12/5 or -2.4.

Given the equations y^2+xy−3x=−3 and dy/dt=−2 when x=2 and y=−3, we need to find the value of dx/dt.

To find dx/dt, we differentiate the b y^2+xy−3x=−3 with respect to t using the chain rule. Applying the chain rule, we get:

2yy' + xy' + y(dx/dt) - 3(dx/dt) = 0.

We are given that dy/dt = -2 when x = 2 and y = -3. Substituting these values, we have:

-12 - 2(dx/dt) - 3(dx/dt) = 0.

Simplifying the equation, we find:

-5(dx/dt) = 12,

which gives us:

dx/dt = -12/5 or -2.4

For more information on differentiation visit: brainly.in/question/47287902

#SPJ11

The correct option is "fx(−2,1) does not exist."

The statement that is true about the function f(x,y) = (x+2)(2x+3y+1) is "fy(−2,1) does not exist."

We are given that f(x,y) = (x+2)(2x+3y+1). We are asked to determine which of the following statements is true about the given function at (-2, 1).Let's find the partial derivatives of the given function f(x, y) with respect to x and y.

We can write;$$f(x,y) = (x+2)(2x+3y+1)$$$$f_{x}(x,y) = \frac{\partial f}{\partial x} = 4x + 3y + 7$$$$f_{y}(x,y) = \frac{\partial f}{\partial y} = 2x + 6y + 2$$

Now, we need to evaluate the partial derivatives at (-2, 1).

Let's calculate them;$$f_{x}(-2, 1) = 4(-2) + 3(1) + 7 = -1$$$$f_{y}(-2, 1) = 2(-2) + 6(1) + 2 = 6$$So, fx(−2,1) = -1 and fy(−2,1) = 6.

Therefore, the option which says fy(−2,1) does not exist. is incorrect.

Hence option 3 is incorrect. Option 4 says fy(−2,1) = 1 which is also incorrect as we just evaluated fy(−2,1) = 6.

So, the correct option is "fx(−2,1) does not exist."

Learn more about function

brainly.com/question/30721594

#SPJ11

The critical numbers of the function f(x) = [tex]3x^4 + 8x^3 - 48x^2[/tex] are x = -2, x = 0, and x = 4.

To find the critical numbers of a function, we need to find the values of x where the derivative of the function is either zero or undefined.

Let's start by finding the derivative of the function f(x) = [tex]3x^4 + 8x^3 - 48x^2[/tex]. Taking the derivative with respect to x, we get:

f'(x) = [tex]12x^3 + 24x^2 - 96x[/tex]

Now, to find the critical numbers, we set the derivative equal to zero and solve for x:

[tex]12x^3 + 24x^2 - 96x = 0[/tex]

Factoring out 12x, we have:

[tex]12x(x^2 + 2x - 8) = 0[/tex]

Now, we can solve for x by setting each factor equal to zero:

12x = 0          --->   x = 0

[tex]x^2 + 2x - 8 = 0[/tex]

Using the quadratic formula, we find the roots of the quadratic equation:

x = (-2 ±[tex]\sqrt{ (2^2 - 4(1)(-8))}[/tex]) / (2(1))

   = [tex](-2 ± sqrt(36)) / 2[/tex]

  = (-2 ± 6) / 2

Simplifying, we have:

x = -2 + 6 = 4

x = -2 - 6 = -8

However, since we are looking for the critical numbers within a specific domain, we discard x = -8 as it is outside the domain.

Therefore, the critical numbers of the function are x = -2, x = 0, and x = 4.

To learn more about function, click here: brainly.com/question/11624077

#SPJ11

The particular solution to the differential equation :
2y'' + y' + y = 2t^2 + 2t - 5e^(2t) is y_p(t) = (3/4)t^2 - (11/8)t + (5/2)e^(2t).
The general solution is :
y(t) = c1e^[(1/4) + sqrt(3)/4]t + c2e^[(1/4) - sqrt(3)/4]t + (3/4)t^2 - (11/8)t + (5/2)e^(2t).

To find a particular solution to the differential equation −2y′′ + y′ + y = 2t^2 + 2t − 5e^(2t), we can use the method of undetermined coefficients.

First, we need to find the homogeneous solution by solving the characteristic equation:

r^2 - (1/2)r - 1/2 = 0

Using the quadratic formula, we get:

r = (1/4) ± sqrt(3)/4

So the homogeneous solution is:

y_h(t) = c1e^[(1/4) + sqrt(3)/4]t + c2e^[(1/4) - sqrt(3)/4]t

To find the particular solution, we need to guess a function that is similar to 2t^2 + 2t − 5e^(2t). Since the right-hand side of the differential equation contains a polynomial of degree 2 and an exponential function, we can guess a particular solution of the form:

y_p(t) = At^2 + Bt + Ce^(2t)

where A, B, and C are constants to be determined.

Substituting their derivatives into the differential equation, we get:

-2(2A + 4Ce^(2t)) + (2At + B + 2Ce^(2t)) + (At^2 + Bt + Ce^(2t)) = 2t^2 + 2t - 5e^(2t)

Simplifying and collecting like terms, we get:

(-2A + C)t^2 + (2A + B + 4C)t + (-2C - 5e^(2t)) = 2t^2 + 2t - 5e^(2t)

Equating coefficients of like terms, we get the following system of equations:

-2A + C = 2

2A + B + 4C = 2

-2C = -5

Solving for A, B, and C, we get:

A = 3/4

B = -11/8

C = 5/2

Therefore, the particular solution is:

y_p(t) = (3/4)t^2 - (11/8)t + (5/2)e^(2t)

The general solution is then:

y(t) = y_h(t) + y_p(t)

y(t) = c1e^[(1/4) + sqrt(3)/4]t + c2e^[(1/4) - sqrt(3)/4]t + (3/4)t^2 - (11/8)t + (5/2)e^(2t)

where c1 and c2 are constants determined by the initial conditions.

To know more about differential equation, visit:
brainly.com/question/32645495
#SPJ11

A left Riemann sum is the approximation of the area under a curve using a left-hand endpoint.

The Riemann sum is determined by dividing the region into numerous smaller rectangles, calculating the area of each rectangle, and then summing the areas of all of the rectangles.

Therefore, following is the solution of the given problems using Left Hand Riemann sum:

Given function is f(x) = −0.2x² + 20

a. Using 5 rectangles Left Hand Riemann Sum for n subintervals is:

L_5= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄)]

Where, Δx = (b-a)/n = (6-1)/5 = 1f(x) = −0.2x² + 20

We can use our calculator to evaluate this.

L_5= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄)]

Δx=1

f(x₀)= f(1) = −0.2(1)² + 20= 19.8

f(x₁)= f(2) = −0.2(2)² + 20= 19.2

f(x₂)= f(3) = −0.2(3)² + 20= 17.4

f(x₃)= f(4) = −0.2(4)² + 20= 14.8

f(x₄)= f(5) = −0.2(5)² + 20= 11

L_5= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄)]

=1[19.8+19.2+17.4+14.8+11]

= 82.4

b. Using 10 rectangles Left Hand Riemann Sum for n subintervals is:

L_10= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₉)]

Where, Δx = (b-a)/n = (6-1)/10 = 0.5f(x) = −0.2x² + 20

We can use our calculator to evaluate this.

L_10= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₉)]

Δx=0.5

f(x₀)= f(1) = −0.2(1)² + 20= 19.8

f(x₁)= f(1.5) = −0.2(1.5)² + 20= 19.425

f(x₂)= f(2) = −0.2(2)² + 20= 19.2

f(x₃)= f(2.5) = −0.2(2.5)² + 20= 17.625

f(x₄)= f(3) = −0.2(3)² + 20= 17.4

f(x₅)= f(3.5) = −0.2(3.5)² + 20= 15.425

f(x₆)= f(4) = −0.2(4)² + 20= 14.8

f(x₇)= f(4.5) = −0.2(4.5)² + 20= 12.425.

f(x₈)= f(5) = −0.2(5)² + 20= 11

f(x₉)= f(5.5) = −0.2(5.5)² + 20= 9.075

L_10= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₉)]

=0.5[19.8+19.425+19.2+17.625+17.4+15.425+14.8+12.425+11+9.075]

= 119.925

c. Using 50 rectangles Left Hand Riemann Sum for n subintervals is:

L_50= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄₉)]

Where, Δx = (b-a)/n = (6-1)/50 = 0.1

f(x) = −0.2x² + 20

We can use our calculator to evaluate this.

L_50= Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄₉)

]Δx=0.1

f(x₀)= f(1) = −0.2(1)² + 20= 19.8

f(x₁)= f(1.1) = −0.2(1.1)² + 20= 19.494

f(x₂)= f(1.2) = −0.2(1.2)² + 20= 19.2

f(x₃)= f(1.3) = −0.2(1.3)² + 20= 18.906

f(x₄)= f(1.4) = −0.2(1.4)² + 20= 18.624

f(x₅)= f(1.5) = −0.2(1.5)² + 20= 18.255

f(x₆)= f(1.6) = −0.2(1.6)² + 20= 17.8

f(x₇)= f(1.7) = −0.2(1.7)² + 20= 17.256

f(x₈)= f(1.8) = −0.2(1.8)² + 20= 16.624

f(x₉)= f(1.9) = −0.2(1.9)² + 20= 15.906

f(x₁₀)= f(2) = −0.2(2)² + 20= 15.2

f(x₁₁)= f(2.1) = −0.2(2.1)² + 20= 14.406

f(x₁₂)= f(2.2) = −0.2(2.2)² + 20= 13.524

f(x₁₃)= f(2.3) = −0.2(2.3)² + 20= 12.554

f(x₁₄)= f(2.4) = −0.2(2.4)² + 20= 11.496

f(x₁₅)= f(2.5) = −0.2(2.5)² + 20= 10.35

f(x₁₆)= f(2.6) = −0.2(2.6)² + 20= 9.116

f(x₁₇)= f(2.7) = −0.2(2.7)² + 20= 7.794

f(x₁₈)= f(2.8) = −0.2(2.8)² + 20= 6.384

f(x₁₉)= f(2.9) = −0.2(2.9)² + 20= 4.886

f(x₂₀)= f(3) = −0.2(3)² + 20= 3.2

f(x₂₁)= f(3.1) = −0.2(3.1)² + 20= 1.426

f(x₂₂)= f(3.2) = −0.2(3.2)² + 20= -0.544

f(x₂₃)= f(3.3) = −0.2(3.3)² + 20= -2.506

f(x₂₄)= f(3.4) = −0.2(3.4)² + 20= -4.456

f(x₂₅)= f(3.5) = −0.2(3.5)² + 20= -6.395

f(x₂₆)= f(3.6) = −0.2(3.6)² + 20= -8.324

f(x₂₇)= f(3.7) = −0.2(3.7)² + 20= -10.244

f(x₂₈)= f(3.8) = −0.2(3.8)² + 20= -12.156

f(x₂₉)= f(3.9) = −0.2(3.9)² + 20= -14.06

f(x₃₀)= f(4) = −0.2(4)² + 20= -15.6

f(x₃₁)= f(4.1) = −0.2(4.1)² + 20= -17.144

f(x₃₂)= f(4.2) = −0.2(4.2)² + 20= -18.684

f(x₃₃)= f(4.3) = −0.2(4.3)² + 20= -20.22

f(x₃₄)= f(4.4) = −0.2(4.4)² + 20= -21.752

f(x₃₅)= f(4.5) = −0.2(4.5)² + 20= -23.275

f(x₃₆)= f(4.6) = −0.2(4.6)² + 20= -24.792

f(x₃₇)= f(4.7) = −0.2(4.7)² + 20= -26.304

f(x₃₈)= f(4.8) = −0.2(4.8)² + 20= -27.812

f(x₃₉)= f(4.9) = −0.2(4.9)² + 20= -29.316

f(x₄₀)= f(5) = −0.2(5)² + 20= -30

f(x₄₁)= f(5.1) = −0.2(5.1)² + 20= -31.478

f(x₄₂)= f(5.2) = −0.2(5.2)² + 20= -32.952

f(x₄₃)= f(5.3) = −0.2(5.3)² + 20= -34.422

f(x₄₄)= f(5.4) = −0.2(5.4)² + 20= -35.888

f(x₄₅)= f(5.5) = −0.2(5.5)² + 20= -37.35

f(x₄₆)= f(5.6) = −0.2(5.6)² + 20= -38.808

f(x₄₇)= f(5.7) = −0.2(5.7)² + 20= -40.262

f(x₄₈)= f(5.8) = −0.2(5.8)² + 20= -41.712

f(x₄₉)= f(5.9) = −0.2(5.9)² + 20= -43.158

L_50=Δx[f(x₀)+f(x₁)+f(x₂)+.....+f(x₄₉)]

=0.1[19.8+19.494+19.2+18.906+18.624+18.255+17.8+17.256+16.624+15.906+15.2+14.406+13.524+12.554+11.496+10.35+9.116+7.794+6.384+4.886+3.2+1.426-0.544-2.506-4.456-6.395-8.324-10.244-12.156-14.06-15.6-17.144-18.684-20.22-21.752-23.275-24.792-26.304-27.812-29.316-30-31.478-32.952-34.422-35.888-37.35-38.808-40.262-41.712-43.158]

= 249.695

Therefore, the Left Hand Riemann Sum for the following problems are:L_5= 82.4 (approx) L_10= 119.925 (approx) L_50= 249.695 (approx)

to know more about Riemann sum visit:

https://brainly.com/question/30404402

#SPJ11

The time complexity of this dynamic programming approach is \( O(n) \) as we iterate through each point on the segment.

The problem of traveling from the west-most point \( s \) to the east-most point \( t \) of a 1-dimensional segment with \( n \) teleporters can be approached using dynamic programming. Let's consider the subproblem of reaching each point \( x \) on the segment and compute the minimum cost to reach \( x \).

Let's define an array \( dp \) of size \( n+2 \), where \( dp[x] \) represents the minimum cost to reach point \( x \). We initialize all elements of \( dp \) with a large value (infinity) except for \( dp[s] \) which is set to 0, as the cost to reach the starting point is 0.

We can then iterate through each point \( x \) on the segment and update \( dp[x] \) by considering all possible teleporters. For each teleporter at position \( p \), we can teleport from \( p \) to \( x \) with a cost of \( c \). We update \( dp[x] \) by taking the minimum of the current value of \( dp[x] \) and \( dp[p] + c \).

Finally, the minimum cost to reach the east-most point \( t \) will be stored in \( dp[t] \).

The time complexity of this dynamic programming approach is \( O(n) \) as we iterate through each point on the segment.

To know more about time complexity, visit:

https://brainly.com/question/13142734

#SPJ11

Therefore, the correct choice is: A. The function has a relative minimum value of f(x, y) = at (x, y) = (11, -22).

To find the relative maximum and minimum values of the function [tex]f(x, y) = x^2 + xy + y^2 - 31y + 320[/tex], we need to find the critical points and determine their nature.

First, let's find the partial derivatives of f(x, y) with respect to x and y:

∂f/∂x = 2x + y

∂f/∂y = x + 2y - 31

To find the critical points, we need to solve the system of equations ∂f/∂x = 0 and ∂f/∂y = 0:

2x + y = 0

x + 2y - 31 = 0

Solving these equations, we find x = 11 and y = -22. So the critical point is (11, -22).

To determine the nature of this critical point, we can calculate the second-order partial derivatives:

[tex]∂^2f/∂x^2 = 2\\∂^2f/∂x∂y = 1\\∂^2f/∂y^2 = 2\\[/tex]

We can use the second derivative test to analyze the critical point:

If [tex]∂^2f/∂x^2 > 0[/tex] and [tex](∂^2f/∂x^2)(∂^2f/∂y^2) - (∂^2f/∂x∂y)^2 > 0[/tex], then the critical point is a relative minimum.

If [tex]∂^2f/∂x^2 > 0[/tex] and [tex](∂^2f/∂x^2)(∂^2f/∂y^2) - (∂^2f/∂x∂y)^2 < 0[/tex], then the critical point is a relative maximum.

In our case,

[tex]∂^2f/∂x^2 = 2 > 0[/tex]

[tex](∂^2f/∂x^2)(∂^2f/∂y^2) - (∂^2f/∂x∂y)^2 = 2(2) - 1^2 \\= 3 > 0[/tex]

. So the critical point (11, -22) is a relative minimum.

To know more about minimum value,

https://brainly.com/question/33422041

#SPJ11

Lance should purchase 3/2 hamburgers and 1/2 orders of fries to maximize their satisfaction.

We are given that:

Lance has $5 to spend on hamburgers ($3 each) and french fries ($1 per order).Lance's satisfaction from eating a hamburgers and y orders of french fries is measured by a function

S(x, y) = √(xy).

Use the method of Lagrange Multipliers to find how much of each type of food should Lance purchase to maximize their satisfaction. (Assume that the restaurant is very accommodating and allow fractional amounts of food to be purchased.)

We are supposed to maximize the satisfaction of Lance i.e., we need to maximize the function given by

S(x, y) = √(xy).

Let x and y be the number of hamburgers and orders of fries purchased by Lance, respectively.

Let P be the amount Lance spends on the food.

P = 3x + y -----------(1)

Since Lance has only $5 to spend, therefore

P = 3x + y = 5. --------- (2)

Therefore, we have to maximize the function S(x, y) = √(xy) subject to the constraint

3x + y = 5

Using the method of Lagrange Multipliers, we have:

L(x, y, λ) = √(xy) + λ (3x + y - 5)

For stationary points, we must have:

Lx = λ 3/2√(y/x)

= λ 3 ... (3)

Ly = λ 1/2√(x/y)

= λ ... (4)

Lλ = 3x + y - 5

= 0 ... (5)

Squaring equations (3) and (4), we have:

3y = x ... (6)

Again, substituting 3y = x in equation (5), we have:

9y + y - 5 = 0

=> y = 5/10

= 1/2

Substituting y = 1/2 in equation (6), we have:

x = 3

y = 3/2

Therefore, Lance should purchase 3/2 hamburgers and 1/2 orders of fries to maximize their satisfaction.

To know more about maximize visit

https://brainly.com/question/30072001

#SPJ11

Relative humidity tends to be highest during the early morning hours, shortly before sunrise.

To determine the Wet-Bulb Temperature (WBT) and Wet-Bulb Depression (WBD), we need the dry-bulb temperature (DBT) and relative humidity (RH) values.

The Wet-Bulb Temperature (WBT) is the lowest temperature that can be achieved by evaporating water into the air at constant pressure, while the Wet-Bulb Depression (WBD) is the difference between the dry-bulb temperature (DBT) and the wet-bulb temperature (WBT). These values are useful in determining the potential for evaporative cooling and assessing heat stress conditions.

Day 1: Air Temperature= 86°F and RH= 60%

To calculate the WBT and WBD for Day 1, we would need additional information such as the barometric pressure or the dew point temperature. Without these values, we cannot determine the specific WBT or WBD for this day.

Day 2: Air Temperature= 41°F and RH= 90%

Similarly, without the necessary additional information, we cannot calculate the WBT or WBD for Day 2.

Regarding your question about the point during the day with the lowest and highest outside relative humidity values, it is generally observed that the relative humidity tends to be highest during the early morning hours, shortly before sunrise. This is because the air temperature often reaches its lowest point overnight, and as the air cools, its capacity to hold moisture decreases, leading to higher relative humidity values.

Conversely, the outside relative humidity tends to be lowest during the late afternoon, typically around the hottest time of the day. As the air temperature rises, its capacity to hold moisture increases, resulting in lower relative humidity values.

It's important to note that these patterns can vary depending on the local climate, weather conditions, and geographical location. Other factors such as wind patterns and nearby bodies of water can also influence relative humidity throughout the day.

Learn more about wet bulb temperature here: brainly.com/question/30069355

#SPJ11

To determine whether the vectors (-2,1,-1) and (0,3,1) are parallel, we need to compare their direction. If they have different directions, they are not parallel. the correct answer is option c) Not parallel.

To check if two vectors are parallel, we can compare their direction vectors. The direction vector of a vector can be obtained by dividing each component of the vector by its magnitude. In this case, let's calculate the direction vectors of the given vectors.

The direction vector of (-2,1,-1) is obtained by dividing each component by the magnitude:

Direction vector of (-2,1,-1) = (-2/√6, 1/√6, -1/√6)

The direction vector of (0,3,1) is obtained by dividing each component by the magnitude:

Direction vector of (0,3,1) = (0, 3/√10, 1/√10)

Comparing the direction vectors, we can see that they are not equal. Therefore, the vectors (-2,1,-1) and (0,3,1) are not parallel. Hence, the correct answer is option c) Not parallel.

Learn more about vectors  here:

https://brainly.com/question/24256726

#SPJ11

The program will output the value of the expression as shown below.

Prognam : { print(\(1 + 1 = 2\)) } Output: 2.

The given program that corresponds to Treas 4 v 4, for the data given will output the value of the expression within the print statement.

The data given is Horton Hear a Who \( 1+1=2 \) \}

The given data is enclosed with curly braces and with a semi-colon at the end.

Hence, it indicates that it is a dictionary object.

The given data also includes a mathematical expression of addition 1+1=2 which doesn't have any significance in the output of the program.

The program reads the data and executes the given expression that is within the print statement.

Therefore, the program will output the value of the expression as shown below.

Prognam : { print(\(1 + 1 = 2\)) } Output: 2.

To conclude, the given program is a simple program that will output the value of the mathematical expression 1+1=2 enclosed in a print statement.

The data given is enclosed with curly braces and a semi-colon at the end which indicates that it is a dictionary object.

The mathematical expression within the given data is meaningless since it doesn't contribute to the output of the program.

To know more about program, visit:

https://brainly.com/question/30613605

#SPJ11

The parallel sides are AB and CD while the area of the Trapezium is 240cm²

A.)

Parallel sides are directly opposite one another and their lines never meet. lines AB and CD.

Therefore, the two parallel sides are AB and CD

B.)

Area of Trapezium = Area of Rectangle + Area of Triangle

Area of rectangle = Length * width

Area of rectangle = 6 * 16 = 96 cm²

Area of Triangle = 1/2*base*height

Area of Triangle= 1/2 * 18 * 16

Area of Triangle = 144 cm²

Hence, area of Trapezium is 240 cm²

Learn more on area:https://brainly.com/question/16904048

#SPJ1

To find the area of the region bounded by the graphs of the equations y = 3x + 10 and y = x^2, we need to determine the points of intersection between the two curves.

Setting the two equations equal to each other, we have:

3x + 10 = x^2

Rearranging the equation, we get:

x^2 - 3x - 10 = 0

Factoring the quadratic equation, we have:

(x - 5)(x + 2) = 0

This gives us two potential x-values for the points of intersection: x = 5 and x = -2.

Now, we can integrate the difference between the two curves to find the area between them. We integrate from the leftmost point of intersection (-2) to the rightmost point of intersection (5):

Area = ∫[from -2 to 5] (3x + 10 - x^2) dx

Evaluating the integral, we get:

Area = [x^2 + 10x - (x^3/3)] from -2 to 5

Plugging in the values, we have:

Area = [(5^2 + 10*5 - (5^3/3)) - ((-2)^2 + 10*(-2) - ((-2)^3/3))]

Simplifying the expression, we find:

Area = [(25 + 50 - (125/3)) - (4 + (-20) - (-8/3))]

Area = [75/3 - (-12/3)] = 87/3

Therefore, the area of the region bounded by the two curves y = 3x + 10 and y = x^2 is 87/3 or 29 units squared.

Learn more about area here:

brainly.com/question/1631786

#SPJ11

The general solution for the differential equation y′′−4y′+4y=0, with initial conditions y(0)=2 and y′(0)=4, is y(x) = (2 + 2x)e^(2x).

To find the general solution of the given differential equation, we can assume that y(x) can be expressed as a power series, y(x) = Σ(a_nx^n), where a_n are constants to be determined. Differentiating y(x), we get y′(x) = Σ(na_nx^(n-1)) and y′′(x) = Σ(n(n-1)a_nx^(n-2)). Substituting these expressions into the differential equation, we obtain the power series Σ(n(n-1)a_nx^(n-2)) - 4Σ(na_nx^(n-1)) + 4Σ(a_nx^n) = 0. Simplifying the equation and setting the coefficients of each power of x to zero, we find that a_n = (n+2)a_(n+2)/(n(n-1)-4n) for n ≥ 2. Using this recursive relationship, we can determine the values of a_n for any desired term in the power series.

Given the initial conditions y(0)=2 and y′(0)=4, we can substitute these values into the power series representation of y(x) and solve for the constants. By doing so, we find that a_0 = 2, a_1 = 6, and all other coefficients are zero. Thus, the general solution is y(x) = (2 + 2x)e^(2x), which satisfies the given differential equation and initial conditions.

Learn more about differential equation here:

https://brainly.com/question/32645495

#SPJ11

a) To find the inverse Fourier transform of X(w) = 2δ(w-1) + 3δ(w) + 2δ(w+1), where δ(w) represents the Dirac delta function, we can apply the inverse Fourier transform formula. Using the properties of the Dirac delta function,

we know that its inverse Fourier transform is a constant function. Therefore, the inverse Fourier transform of X(w) is given by x(t) = 2e^(jωt)e^(-jω) + 3 + 2e^(jωt)e^(jω), which simplifies to x(t) = 2e^(-jωt) + 3 + 2e^(jωt).

b) For Y(w) = 7cos(3w), we can use the inverse Fourier transform properties and the Fourier transform of the cosine function. The Fourier transform of cos(at) is given by ½[δ(w - a) + δ(w + a)]. In this case, the inverse Fourier transform of Y(w) is y(t) = 7/2[δ(w - 3) + δ(w + 3)].

c) For Y(w) = 20nTδ(w - 3)/(5w - 5), where nT is the unit step function, we can use the inverse Fourier transform properties and the Fourier transform of the unit step function. The Fourier transform of nT is given by 1/(jw) + πδ(w). Substituting this into Y(w), we have Y(w) = 20[1/(jw) + πδ(w)]δ(w - 3)/(5w - 5). Simplifying this expression, the inverse Fourier transform of Y(w) is y(t) = 20[1 + πnT(t - 3)].

Learn more about Dirac delta function here: brainly.com/question/33066688

#SPJ11