$(\frac{a}{b}+\frac{b}{c}+\frac{c}{a})^{2}\geq \frac{3}{2}(\sum \frac{a+b}{c})$
Với mọi $a,b,c>0$
Edited by triethuynhmath, 23-07-2012 - 17:52.
$(\frac{a}{b}+\frac{b}{c}+\frac{c}{a})^{2}\geq \frac{3}{2}(\sum \frac{a+b}{c})$Chứng minh rằng
$(\frac{a}{b}+\frac{b}{c}+\frac{c}{a})^{2}\geq \frac{3}{2}(\sum \frac{a+b}{c})$
Với mọi $a,b,c>0$
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