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darkangel98


Cho x,y,z>0. Cm bđt:
[TEX]\sqrt[]{\frac{2x}{x+y}}+\sqrt[]{\frac{2y}{y+z}}+\sqrt[]{\frac{2z}{x+z}}\leq3[/TEX]
[TEX]\sqrt[]{\frac{2x}{x+y}}+\sqrt[]{\frac{2y}{y+z}}+\sqrt[]{\frac{2z}{x+z}}\leq3[/TEX]