26) Let A be annxn matrix such that A2 = 0. Then what can we say about the matrix I+ A? A)I+ A is invertible, and (I+ A)-1 =1-A. C)I+A is invertible, and (I. A)-1 1. B) I+ A is invertible, and (I + A)-1-1+ A. D)I. A is not invertible.

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