If \[A=\left[ \begin{matrix} -1 & 0 & 0 \\ 0 & -1 & 0 \\ 0 & 0 & -1 \\ \end{matrix} \right]\], then \[{{A}^{2}}\]is [MNR 1980]

If \[A=\left[ \begin{matrix} -1 & 0 & 0 \\ 0 & -1 & 0 \\

1.	If \[A=\left[ \begin{matrix} -1 & 0 & 0 \\ 0 & -1 & 0 \\ 0 & 0 & -1 \\ \end{matrix} \right]\], then \[{{A}^{2}}\]is [MNR 1980]
A.	Null matrix
B.	Unit matrix
C.	A
D.	2A
Answer» C. A

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If \[A=\left[ \begin{matrix} -1 & 0 & 0 \\ 0 & -1 & 0 \\ 0 & 0 & -1 \\ \end{matrix} \right]\], then \[{{A}^{2}}\]is [MNR 1980]

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