Problem 7. Suppose that A is an invertible n x n matrix. Determine if the partitioned [In (block) 2n x 2n matrix B = is invertible. If B is invertible, find B-¹. (a) B is not invertible (b) B−¹. (c) B-¹ = (d) B-¹ A In - In -A In A 0 In (e) None of the above In A In

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