C
cuong276


Cho a,b,c>0. CMR:
[TEX]S=30a+3b^2+\frac{2c^3}{9}+36(\frac{1}{ab}+\frac{1}{bc}+\frac{1}{ca}\geq84[/TEX]
[TEX]S=30a+3b^2+\frac{2c^3}{9}+36(\frac{1}{ab}+\frac{1}{bc}+\frac{1}{ca}\geq84[/TEX]