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miko_tinhnghich_dangyeu


Cho a,b,c>0CMR
[TEX]\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\geq\frac{3}{a+2b}+\frac{3}{b+2c}+\frac{3}{c+2a}[/TEX]
Giai gium nha ! Cam on truoc

[TEX]\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\geq\frac{3}{a+2b}+\frac{3}{b+2c}+\frac{3}{c+2a}[/TEX]
Giai gium nha ! Cam on truoc