12th Class Mathematics What Can You Become

  • question_answer 26)
    If  prove that A3 ? 6A2 + 7A + 2I = O.  

    Answer:

    A2 = A . A                         A3 = A2 . A                         L.H.S. = A3 ? 6A2 + 7A + 21                                         


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