Cho a;b;c >0.với abc=1 .Tìm MAX :S=$\Sigma \frac{a}{b^{2}+c^{2}+a}$
Cho a;b;c >0.với abc=1 .Tìm MAX :S=$\Sigma \frac{a}{b^{2}+c^{2}+a}$
Started By duc321999real, 03-03-2013 - 21:21
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