cho a,b,c >0. a+b+c=3. chứng minh rằng:
$\frac{ab}{\sqrt{ab+bc}}+\frac{bc}{\sqrt{bc+ca}}+\frac{ca}{\sqrt{ca+ab}}\leq \frac{3}{\sqrt{2}}$
$\frac{ab}{\sqrt{ab+bc}}+\frac{bc}{\sqrt{bc+ca}}+\frac{ca}{\sqrt{ca+ab}}\leq \frac
Started By darkangle249, 23-05-2021 - 15:25
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