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JEE Main & Advanced Mathematics Determinants & Matrices Question Bank Types of matrices, Algebra of matrices

  • question_answer
    The order of \[[x\,y\,z]\,\,\left[ \begin{matrix}    a & h & g  \\    h & b & f  \\    g & f & c  \\ \end{matrix} \right]\,\left[ \begin{align}   & x \\  & y \\  & z \\ \end{align} \right]\] is  [EAMCET 1994]

    A) \[3\times 1\]

    B) \[1\times 1\]

    C) \[1\times 3\]

    D) \[3\times 3\]

    Correct Answer: A

    Solution :

    Order will be\[(1\times 3)(3\times 3)(3\times 1)=(1\times 1)\].


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