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    Subject

    Quantitative Aptitude

    Topic

    Power & Logarithm

    If logx (9/16) =  - 1/2, then x is equal to:

    ক)
    -3/4
    খ)
    3/4
    গ)
    81/256
    ঘ)
    256/81

    Explanation

    logx (9/16) = -1/2 => x-1/2 = 9/16 => 1/√x =9/16 => √x = 16/9 => x = (16/9)2 => x = 256/81

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