2. Solved Papers
  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2004

  • question_answer
    Let A and B are two square matrices such that \[AB=A\]and\[BA=B,\]then\[{{A}^{2}}\]equals to:

    A)  B                                           

    B)  A

    C)  \[I\]                     

    D)         0

    E)  \[{{A}^{-1}}\]

    Correct Answer: B

    Solution :

    \[{{A}^{2}}=A.A=AB.A\] \[=A.BA=AB=A\]


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