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Math Help - Inequality

  1. #1
    Senior Member
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    Nov 2007
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    Inequality

    Prove that if a,b,c>0 then \frac {ab}{a^2+3b^2}+\frac {bc}{b^2+3c^2}+\frac {ac}{c^2+3a^2}\le \frac 34.
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  2. #2
    Senior Member
    Joined
    Nov 2007
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    Any ideas? I've tried putting xyz=1 with x=\frac ab...
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