8 Every statement below is false Change the underlined word

8. Every statement below is false. Change the underlined word or expression to make it true. (Do not use the word not) a. If one row of a square matrix is a multiple of another row, then the determinant is 1. b. lf A and B are invertible n x n matrices, then (AB)^-1 = A^-1B^-1 c. A is an n x m matrix and B is an m x r matrix, then the product AB is an r x n matrix. d. The matrix[a b c d] is invertible when ab - cd not equal to 0.

Solution

(a) replace 1 by 0.

(b) B^-1 A^-1

(c) n X r

(d) ad-bc is not equal to 0