cho a,b,c>o và a+b+c=1. CMR:
$2(\frac{a}{b}+\frac{b}{c}+\frac{c}{a})\geq \frac{a+1}{1-a}+\frac{b+1}{1-b}+\frac{c+1}{1-c}$
Edited by dangthanhnhan, 24-07-2013 - 15:41.
$2(\frac{a}{b}+\frac{b}{c}+\frac{c}{a})\geq \frac{a+1}{1-a}+\frac{b+1}{1-b}+\frac{c+1}{1-c
Started By dangthanhnhan, 24-07-2013 - 15:41
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