A) A
B) 2A
C) ? 2A
D) \[-A\]
Correct Answer: A
Solution :
[a] \[\because A=\left| \begin{align} & 2\,\,\,\,\,0\,\,\,\,\,4 \\ & 7\,\,\,\,\,0\,\,\,\,\,5 \\ & 0\,\,\,\,\,0\,\,\,\,\,3 \\ \end{align} \right|\]which is singular. So, \[{{A}^{2}}=A.\] Hence, option [a] is correct.You need to login to perform this action.
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