Question: 5. The matrix A is an n. x 71 matrix and A2 has inverse B. {a} Show that .43 is the inverse of A. {b}

5. The matrix A is an n. x 71 matrix and A2 has
5. The matrix A is an n. x 71 matrix and A2 has inverse B. {a} Show that .43 is the inverse of A. {b} Hence, or otherwise, show that AB = BA

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