defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Matrices

If A = \(\begin{bmatrix} \ \ 0& \ \ 0& -1\\ \ \ 0& -1 & \ \ 0\\ -1& \ \ 0 & \ \ 0\end{bmatrix}\), then which of the following is true?

1
A2 = A
2
A-1 = A
3
A3 = I
4
None of these.
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