Let A and B be n × n matrices such that AB is invertible. Show that A must be invertible. You cannot use Theorem 6(b), because you cannot assume that A and B are invertible.

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A: We will solve the problem.

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A: On solving this we will get

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A: #7

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Q: Write the augmented matrix for each system of equations. 7x-9y+3z=6 -2x-6y+10z=3 -3x-5y+5z=1

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Q: Convert 100 dollars to "widgets" (1 dollar = 3.94 widgets) 39.4 O 3940 394

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