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Math Help - SAT Kaplan problem

  1. #1
    Junior Member
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    Jul 2011
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    25

    SAT Kaplan problem

    or all numbers x and y, let the operation # be defined as x#y=x-xy. If a and b are positive integers, whuich can be equal to zero?

    1) a#b
    2) (a+b)#b
    3) A # (a+b)


    1 only
    2 only
    3 only
    1 and 3
    1 and 2
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  2. #2
    Senior Member
    Joined
    Nov 2010
    From
    Clarksville, ARk
    Posts
    398

    Re: SAT Kaplan problem

    What have you tried?

    Where are you stuck ??
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