Let A= | ll 1 & 0 0 & 0 |, then - Vidyadip

Question

Let $A=\left|\begin{array}{ll}1 & 0 \\ 0 & 0\end{array}\right|$, then

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Answer

(b) $A ^2= A$
Explanation: $A =\left|\begin{array}{ll}1 & 0 \\ 0 & 0\end{array}\right|$, then $A ^2=\left|\begin{array}{ll}1 & 0 \\ 0 & 0\end{array}\right|\left|\begin{array}{ll}1 & 0 \\ 0 & 0\end{array}\right|=\left|\begin{array}{ll}1 & 0 \\ 0 & 0\end{array}\right|= A$

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