11. Suppose A, B and C are n x n matrices, where C is invertible and CAC^-1 = B. Which of the following is False?
a. CA = BC b. A = C^-1BC c. det A = det B d. B is invertible
e. none of the above (they are all True)
12. Let A = [[-1, 0, 1], [1, 2, -2], [2, -1, -1]]. Then null A is
a. {0} b. a line c. a plane d. R^3 e. none of the above