1.

Let M4 = I, (where I denotes the identity matrix) and M ≠ I, M2 ≠ I and M3 ≠ I. Then, for any natural number k, M−1 equals:

A. M4k + 1
B. M4k + 2
C. M4k + 3
D. M4k
Answer» D. M4k


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