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12th Class Mathematics Sample Paper Mathematics Olympiad Sample Paper-5

  • question_answer
    If A is invertible, then which of the following is not true?

    A)  \[{{A}^{-2}}=|A{{|}^{-1}}\]          

    B)  \[{{\left( {{A}^{-2}} \right)}^{-1}}={{\left( {{A}^{-1}} \right)}^{2}}\]

    C)  \[{{\left( A' \right)}^{-1}}=\left( {{A}^{-1}} \right)'\]

    D)         None of these

    Correct Answer: A

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