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exponent mystery

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nafiul9090 Really wants to Beat The GMAT! Default Avatar
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exponent mystery Post Tue Mar 13, 2012 5:59 pm
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  • Lap #[LAPCOUNT] ([LAPTIME])
    if x is not equals to 0, what is the value of (x^m/x^n)^5

    i) n-m=2
    ii) x^2= 1/4

    oa comes later

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    killer1387 GMAT Destroyer! Default Avatar
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    Post Tue Mar 13, 2012 7:47 pm
    nafiul9090 wrote:
    if x is not equals to 0, what is the value of (x^m/x^n)^5

    i) n-m=2
    ii) x^2= 1/4

    oa comes later
    (x^m/x^n)^5

    1) (x^(m-n))^5=(x^(-2))^5
    Insufficient

    2) insufficient

    1& 2
    sufficient

    hence C

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