A) I
B) |A|
C) \[|A|I\]
D) None of these
Correct Answer: C
Solution :
\[A[adj(A)]=\left[ \,\begin{matrix} 3 & 4 \\ 5 & 7 \\ \end{matrix}\, \right]\,\left[ \,\begin{matrix} 7 & -4 \\ -5 & 3 \\ \end{matrix}\, \right]=\left[ \,\begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix}\, \right]=|A|I\] \[bx+ay-z=0\].You need to login to perform this action.
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