Answer each of the following questions with justification. (a) If A is a 5 x 6 matrix, can the columns of A form a basis for R5. (b) If A, B, and C are n x n matrices, A is invertible, and AB = AC, then must B = C? (c) If x is an eigenvector of the 4 x 4 matrix A corresponding to the eigenvalue 2 = 0, do the columns of A span R*? (d) If A is a 3 x 4 matrix, what is the largest value of the rank of A? What is the largest value of the dimension of the null space of A? (e) Let A be a 4 x 4 matrix with det A = 6, and the matrix B is formed from A by first interchanging Rows two and three, and then dividing Row one by 2. What is det B? %3D
Answer each of the following questions with justification. (a) If A is a 5 x 6 matrix, can the columns of A form a basis for R5. (b) If A, B, and C are n x n matrices, A is invertible, and AB = AC, then must B = C? (c) If x is an eigenvector of the 4 x 4 matrix A corresponding to the eigenvalue 2 = 0, do the columns of A span R*? (d) If A is a 3 x 4 matrix, what is the largest value of the rank of A? What is the largest value of the dimension of the null space of A? (e) Let A be a 4 x 4 matrix with det A = 6, and the matrix B is formed from A by first interchanging Rows two and three, and then dividing Row one by 2. What is det B? %3D
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section: Chapter Questions
Problem 1RQ
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