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  1. (1 2 1)x = (1 0 0)4 Then x is equal to

  2. A.
    2
    B.
    3
    C.
    5
    D.
    does not exist

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    Answer : Option B

    Explanation :

    x2 = 2x + 1 = 16

    x2 + 2x - 15 = 0, (x - 3)(x + 5) = 0, x = 3, - 5

    Thus x = 3.


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