# Find the products AB and BA to determine whether B is the multiplicative inverse of A. ? a. B ≠ A^-1 b. B = A-1

##### 1 Answer

Apr 21, 2018

B is the multiplicative inverse of A and A is the multiplicative inverse of B.

#### Explanation:

Let's multiply AB first.

First Row, First Column

First Row, Second Column

Second Row, First Column

Second Row, Second Column

So AB =

Lets try BA now.

First Row, First Column

First Row, Second Column

Second Row, First Column

Second Row, Second Column

So BA =

A and B are multiplicative inverses.