M
myanlien


Giúp với 
1/x+1/y+1/z = 1
Cmr:
[TEX]\sqrt{x+yz}+\sqrt{y+xz}+\sqrt{z+xy}\geq\sqrt{xyz}+\sqrt{x}+\sqrt{y}+\sqrt{z}[/TEX]
1/x+1/y+1/z = 1
Cmr:
[TEX]\sqrt{x+yz}+\sqrt{y+xz}+\sqrt{z+xy}\geq\sqrt{xyz}+\sqrt{x}+\sqrt{y}+\sqrt{z}[/TEX]