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Giai bpt sau
[TEX]\frac{1}{\sqrt[]{x+2}} +\frac{1}{\sqrt[]{-x-1}}\geq 1+\frac{2}{3}x[/TEX]
Minh giai ra -2<x<-1, ko biet dung ko.???
[TEX]\frac{1}{\sqrt[]{x+2}} +\frac{1}{\sqrt[]{-x-1}}\geq 1+\frac{2}{3}x[/TEX]
Minh giai ra -2<x<-1, ko biet dung ko.???