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Math Help - Help!! find the minimum

  1. #1
    Newbie
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    Mar 2013
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    Changhua
    Posts
    7

    Help!! find the minimum

    a, b, c, d R
    and ad-bc=1
    find the minimum of a2+b2+c2+ac+bd

    help me!! thanks
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  2. #2
    Newbie
    Joined
    Mar 2013
    From
    Changhua
    Posts
    7

    Re: Help!! find the minimum

    sorry, it should be "find the minimum of a2+b2+c2+d2+ac+bd"
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