H
hien_vuthithanh


a,b,c >0.c/m
$\dfrac{a^3}{a^2+b^2}+\dfrac{b^3}{b^2+c^2}+\dfrac{c^3}{c^2+a^2}$\geq$\dfrac{a+b+c}{2}$
$\dfrac{a^3}{a^2+b^2}+\dfrac{b^3}{b^2+c^2}+\dfrac{c^3}{c^2+a^2}$\geq$\dfrac{a+b+c}{2}$