M
magician93


Cho a,b,c>0
CMR:[TEX]\frac{a^5}{b^5+c^5}+\frac{b^5}{a^5+c^5}+\frac{c^5}{a^5+b^5}\geq \frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}[/TEX]
CMR:[TEX]\frac{a^5}{b^5+c^5}+\frac{b^5}{a^5+c^5}+\frac{c^5}{a^5+b^5}\geq \frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}[/TEX]
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