a) For invertible matrices A, BE R™×", show that ((AB)")-1 = (A-1)" (B1)". b) Let A, B, C, D e R"*" be invertible matrices and suppose A" = C" ((A-'D)") B. Solve for D in terms of A, B, C, their transposes, and their inverses. Your answer should not contain any nested expressions in parentheses.

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