Consider the n ×n matrices A and B and their product AB (a) Show that if AB is invertible, then so is A. (Hint: There is a matrix W such that ABW = I. Why?) (b) Show that if AB is invertible, then so is B.

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A: Explanation of the answer is as follows

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Q: need help 4.4

A: Step 1:Step 2:Step 3:Step 4:

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