12th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-12

  • question_answer
    Let \[A=\left[ \begin{matrix}    1 & -1 & 1  \\    2 & 1 & -3  \\    1 & 1 & 1  \\ \end{matrix} \right]\] and \[10B=\left[ \begin{matrix}    4 & 2 & 2  \\    -5 & 0 & \alpha   \\    1 & -2 & 3  \\ \end{matrix} \right]\].  If B is the inverse of matrix A, then the value of \[\alpha \]is _______.

    A)  3                                

    B) \[-2\]

    C)  5

    D)  4

    E)  None of these

    Correct Answer: C

    Solution :

    Not Available                            


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