A) \[2\]
B) \[4\]
C) \[8\]
D) \[16\]
Correct Answer: B
Solution :
[b] We know that \[|adj.\,\,A|\,\,=\,\,|A{{|}^{n-1}},\] where n is order of square matrix A. For \[n=3;\] \[|adj.\,{{A}^{-1}}|\,\,=\,\,|{{A}^{-1}}{{|}^{2}}=\frac{1}{|A{{|}^{2}}}=\frac{1}{{{\left( \frac{1}{2} \right)}^{2}}}=4\]You need to login to perform this action.
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