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  1. Top | #1

    Nov 2011
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    [COLOR=var(--primary-text)]a,b,c >= 0
    ab+bc+ca+abc=4
    Prove that:
    a+b+c+5abc >= 8

    [/COLOR]


    [COLOR=var(--secondary-text)]





    [/COLOR]






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  3. Top | #2

    Feb 2011
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