CMR:
$\frac{ab}{\sqrt{c+ab}}+\frac{bc}{\sqrt{a+bc}}+\frac{ac}{\sqrt{b+ac}}\leq \frac{1}{2}$
à Cm bằng Cauchy hộ e nha
Edited by luckystar1107458, 29-01-2013 - 15:35.
Edited by luckystar1107458, 29-01-2013 - 15:35.
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