JEE Main & Advanced Mathematics Determinants & Matrices Question Bank Special types of matrices, Transpose, Adjoint and Inverse of matrices

  • question_answer
    The inverse of the matrix \[\left[ \begin{matrix}    1 & 0 & 0  \\    0 & 1 & 0  \\    0 & 0 & 1  \\ \end{matrix} \right]\] is  [MP PET 1989; Pb. CET 1989, 1993]

    A) \[\left[ \begin{matrix}    0 & 0 & 1  \\    0 & 1 & 0  \\    1 & 0 & 0  \\ \end{matrix} \right]\]

    B) \[\left[ \begin{matrix}    1 & 0 & 0  \\    0 & 1 & 0  \\    0 & 0 & 1  \\ \end{matrix} \right]\]

    C) \[\left[ \begin{matrix}    0 & 1 & 0  \\    0 & 0 & 1  \\    1 & 0 & 0  \\ \end{matrix} \right]\]

    D) \[\left[ \begin{matrix}    1 & 0 & 0  \\    0 & 0 & 1  \\    0 & 1 & 0  \\ \end{matrix} \right]\]

    Correct Answer: B

    Solution :

    It is obvious.


You need to login to perform this action.
You will be redirected in 3 sec spinner