T
thienlong_cuong


cho x \geq y \geq z > 0
CMR :
[TEX]\frac{x^{2}.y}{z} + \frac{y^{2}.z}{x} + \frac{z^{2}.x}{y} \geq x^2 + y^2 + z^2[/TEX]
CMR :
[TEX]\frac{x^{2}.y}{z} + \frac{y^{2}.z}{x} + \frac{z^{2}.x}{y} \geq x^2 + y^2 + z^2[/TEX]
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