Question:
If $A$ is a 2-rowed square matrix and $|A|=6$ then $A \cdot \operatorname{adj} A=$ ?
A. $\left(\begin{array}{ll}6 & 0 \\ 0 & 6\end{array}\right)$
B. $\left(\begin{array}{ll}3 & 0 \\ 0 & 3\end{array}\right)$
C. $\left(\begin{array}{ll}3 & 0 \\ 0 & 3\end{array}\right)$
D. None of these
Solution:
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