A) \[{A}'=A\]
B) \[{A}'=-A\]
C) \[{A}'=2A\]
D) None of these
Correct Answer: B
Solution :
\[{A}'=\left[ \begin{matrix} 0 & -1 & 2 \\ 1 & 0 & -5 \\ -2 & 5 & 0 \\ \end{matrix} \right]=-A\].
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