A) \[({{\omega }^{2}}-\omega )\bar{A}\]
B) \[(\omega -{{\omega }^{2}})\bar{A}\]
C) \[-\bar{A}\]
D) \[\bar{A}\]
Correct Answer: B
Solution :
Cofactor matrix of \[A=(\omega -{{\omega }^{2}})\left( \begin{matrix} 1 & 1 & 1 \\ 1 & \omega & {{\omega }^{2}} \\ 1 & \omega & {{\omega }^{2}} \\ \end{matrix} \right)\] \[=(\omega -{{\omega }^{2}})\bar{A}\]You need to login to perform this action.
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