Given
(c) For what value of α, if any, does Ax = 0 have an infinite number of solutions? Why? What are the eigenvalues of A in this case? Explain why this makes sense.
(d) For what value of α, if any, does Ax = x have a solution? If this is possible, how many solutions are there? Why?
Homework Answers
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Given
(c) For what value of α, if any, does Ax = 0
have an infinite...
For problems 4) and 5) answer the following (a) Does the equation Ax = 0 have...
For problems 4) and 5) answer the following (a) Does the equation Ax = 0 have a nontrivial solution? (b) Does the equation Ax = b have at least one solution for every possible b? 4) A is a 4 x 4 matrix with three pivot positions. 5) A is a 3 x 2 matrix with two pivot positions.
Lat A= and b= . show that the equation Ax=b does not have a solution for some choices of b, and describe the set of all b for which Ax=b does have a solution.
Let A = and b = . Show that the equation Ax = b does not have a solution for some choices of b, and describe the set of all b for which Ax = b does have a solution. How can it be shown that the equation Ax = b does not have a solution for some choices of b? A. Row reduce the augmented matrix [A b] to demonstrate that [A b] has a pivot position in every row B. Find a vector...
please explain all, thanks! 4. (60 pts) A particle in an infinite square well of width...
please explain all, thanks!
4. (60 pts) A particle in an infinite square well of width L has an initial wave function (x,t = 0) = Ax(L - x)2, OSX SL a) Find y(x, t) fort > 0. You first have to normalize the wave function. Hint: this is best expressed an infinite series: show that the wave function coefficients are on = * 31% (12 – n?)(1-(-1)") → (n = 87315 (12 - nºre?); n odd. b) Which energy...
Consider the linear system of first order differential equations x' = Ax, where x= x(t), t...
Consider the linear system of first order differential equations x' = Ax, where x= x(t), t > 0, and A has the eigenvalues and eigenvectors below. 4 2 11 = -2, V1 = 2 0 3 12 = -3, V2= 13 = -3, V3 = 1 7 2 i) Identify three solutions to the system, xi(t), xz(t), and x3(t). ii) Use a determinant to identify values of t, if any, where X1, X2, and x3 form a fundamental set of...
1-4 - 31 Let A= 3 and b= Show that the equation Ax=b does not have...
1-4 - 31 Let A= 3 and b= Show that the equation Ax=b does not have a solution for all possible b, and describe the set 4 26 of all b for which Ax=b does have a solution. How can it be shown that the equation Ax = b does not have a solution for all possible b? Choose the correct answer below. O A. Row reduce the augmented matrix [ a b ] to demonstrate thatſ A b )...
Exercise 15.3 Under what conditions does the matrix equation Ax = 0 have a solution x...
Exercise 15.3 Under what conditions does the matrix equation Ax = 0 have a solution x that is NOT the zero vector where A is assumed to be square? a) never b) always c) if A is full rank d) if A is rank deficient
5.[6pts] Consider the system of linear equations in x and y. ax+by = 0 x +...
5.[6pts] Consider the system of linear equations in x and y. ax+by = 0 x + dy = 0 (a) Under what conditions will the system have infinitely many solutions? (6) Under what conditions will the system have a unique solution? (c) Under what conditions will the system have no solution?
7. Consider the boundary value problem for the Laplace equation on the strip u(0, y) u(n,y)=0,...
7. Consider the boundary value problem for the Laplace equation on the strip u(0, y) u(n,y)=0, = a. Explain why it makes sense to look for a solution of the form b. Find all solutions of the form u(x,y) = Σ Yn (y) sin nx satisfying c. Among the solutions you found in part (b) find the unique solution u (x, y) = Σ Y, (y) sin na. the Laplace equation and the boundary conditions. (i.e. find Yn (y).) that...
2y 1. (9 points) Given the initial value problem y' = y (xo) = yo. Use...
2y 1. (9 points) Given the initial value problem y' = y (xo) = yo. Use the existence and uniqueness theorem to show that a) a unique solution exists on any interval where x, 60, b) no solution exists if y(0) = % 70, and c) an infinite number of solutions exist if y(0) = 0.
2.1 Suppose that AX=b does not have a solution. Such inconsistent systems often arise in applications,...
2.1 Suppose that AX=b does not have a solution. Such inconsistent systems often arise in applications, sometimes with large coefficient matrices. The best approximate solution is called the least-squares solution. It states that if the columns of A are linearly dependent, and the matrix AA" is invertible, the least squares solution X is given by 1 X = - ATA [ 40] 2 Find a least-squares solution of AX=b by using above expression for A = 0 2 and b...
For problems 4) and 5) answer the following (a) Does the equation Ax = 0 have a nontrivial solution? (b) Does the equation Ax = b have at least one solution for every possible b? 4) A is a 4 x 4 matrix with three pivot positions. 5) A is a 3 x 2 matrix with two pivot positions.
please explain all, thanks!
4. (60 pts) A particle in an infinite square well of width L has an initial wave function (x,t = 0) = Ax(L - x)2, OSX SL a) Find y(x, t) fort > 0. You first have to normalize the wave function. Hint: this is best expressed an infinite series: show that the wave function coefficients are on = * 31% (12 – n?)(1-(-1)") → (n = 87315 (12 - nºre?); n odd. b) Which energy...
Consider the linear system of first order differential equations x' = Ax, where x= x(t), t > 0, and A has the eigenvalues and eigenvectors below. 4 2 11 = -2, V1 = 2 0 3 12 = -3, V2= 13 = -3, V3 = 1 7 2 i) Identify three solutions to the system, xi(t), xz(t), and x3(t). ii) Use a determinant to identify values of t, if any, where X1, X2, and x3 form a fundamental set of...
1-4 - 31 Let A= 3 and b= Show that the equation Ax=b does not have a solution for all possible b, and describe the set 4 26 of all b for which Ax=b does have a solution. How can it be shown that the equation Ax = b does not have a solution for all possible b? Choose the correct answer below. O A. Row reduce the augmented matrix [ a b ] to demonstrate thatſ A b )...
Exercise 15.3 Under what conditions does the matrix equation Ax = 0 have a solution x that is NOT the zero vector where A is assumed to be square? a) never b) always c) if A is full rank d) if A is rank deficient
5.[6pts] Consider the system of linear equations in x and y. ax+by = 0 x + dy = 0 (a) Under what conditions will the system have infinitely many solutions? (6) Under what conditions will the system have a unique solution? (c) Under what conditions will the system have no solution?
7. Consider the boundary value problem for the Laplace equation on the strip u(0, y) u(n,y)=0, = a. Explain why it makes sense to look for a solution of the form b. Find all solutions of the form u(x,y) = Σ Yn (y) sin nx satisfying c. Among the solutions you found in part (b) find the unique solution u (x, y) = Σ Y, (y) sin na. the Laplace equation and the boundary conditions. (i.e. find Yn (y).) that...
2y 1. (9 points) Given the initial value problem y' = y (xo) = yo. Use the existence and uniqueness theorem to show that a) a unique solution exists on any interval where x, 60, b) no solution exists if y(0) = % 70, and c) an infinite number of solutions exist if y(0) = 0.
2.1 Suppose that AX=b does not have a solution. Such inconsistent systems often arise in applications, sometimes with large coefficient matrices. The best approximate solution is called the least-squares solution. It states that if the columns of A are linearly dependent, and the matrix AA" is invertible, the least squares solution X is given by 1 X = - ATA [ 40] 2 Find a least-squares solution of AX=b by using above expression for A = 0 2 and b...
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