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JEE Main & Advanced Mathematics Determinants & Matrices Question Bank Numerical Value Type Questions - Matrices

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

    Answer:

    5


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