Question

Which pair of matrices are multiplicative inverses of each other?
http://prntscr.com/kqjsrb

Answer 1

yikes

afaik you just have to go through and multiply the matrices in each choice to see which choice gives you the identity matrix as a product

Answer 2

using software I end up getting B as the solution since A*B and B*A are both the identity matrix

lmk if you get something different

Answer 3

A bit difficult, but yes I agree with you. I think it's B, when I multiplied the matrices I got:[1 0]
[0 1]

Answer 4

and that's why the matrices are 'multiplicative inverses'

Answer 5

and they're both identity matrix

Answer 6

yup

for future reference you can just tag me @vocaloid instead of messaging me each time

Answer 7

Okay, will do!