1. If A is a 3 Ã 3 matrix and B is its inverse, what does the...

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1. If A is a 3 × 3 matrix and B is its inverse, what does the product AB equal?
2. If
-4 12 C= 0 6. -12 1. -2

and

4 2 1 -4 -2 2.

Are C and D inverse matrices?

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