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

  • question_answer
    If \[U=[2\,-3\,\,4],X=[0\,\,2\,\,3],\] \[V=\left[ \begin{align}   & 3 \\  & 2 \\  & 1 \\ \end{align} \right]\] and \[Y=\left[ \begin{align}   & 2 \\  & 2 \\  & 4 \\ \end{align} \right]\], then \[UV+XY\]= [MP PET 1997]

    A) 20

    B) [- 20]

    C) - 20

    D) [20]

    Correct Answer: D

    Solution :

    \[UV=[4]\]and \[XY=[16];\,\,\therefore UV+XY=[20]\].


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