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

  • question_answer
    If A is a unit matrix of order n, then \[A(adj\,A)\]is [DCE 2005]

    A) Zero matrix

    B) Row matrix

    C) Unit matrix

    D) None of these

    Correct Answer: A

    Solution :

    If A is a singular matrix of order n, then \[A(adj\,A)=(adj\,A)A=0=\]zero matrix.


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