A) \[\left[ \begin{matrix} -3 & -1 \\ 2 & -1 \\ \end{matrix} \right]\]
B) \[\left[ \begin{matrix} 3 & 1 \\ -2 & 1 \\ \end{matrix} \right]\]
C) \[\left[ \begin{matrix} 3 & -2 \\ 1 & 1 \\ \end{matrix} \right]\]
D) \[\left[ \begin{matrix} \,3 & -1 \\ -2 & 1 \\ \end{matrix} \right]\]
Correct Answer: B
Solution :
adj can be obtained by changing the diagonal element and changing the sign of off diagonal elements. Here, \[adj\,(A)=\left[ \begin{matrix} 3 & 1 \\ -2 & 1 \\ \end{matrix} \right]\].You need to login to perform this action.
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