Cho $a,b,c>0$, $ab+bc+ca=abc$ CM:
$\frac{a}{b^{2}}+\frac{b}{c^{2}}+\frac{c}{a^{2}}\geq 3$($\frac{1}{a^{2}}+\frac{1}{b^{2}}+\frac{1}{c^{2}}$)
$a,b,c>0$, $ab+bc+ca=abc$
Started By mijumaru, 08-08-2015 - 20:20
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