Question

true or false
Multiplication of an invertible matrix and its inverse is commutative.

Answer 1

what is the defnition of an inverse element?

Answer 2

idk what invertible means

Answer 3

http://en.wikipedia.org/wiki/Matrix_(mathematics)#Invertible_matrix_and_its_inverse

Answer 4

so true?

Answer 5

inverse element:

A' is the inverse of A if and only if: AA' = A'A = id

so yes, its true