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hoangdinhnam1974
2 năm trước
Giúp em câu nè nhớ viết ý tưởng nhé Cho a,b,c >0.Cmr $\frac{a}{b}$+ $\sqrt[]{\frac{b}{c}}$+ $\sqrt[3]{\frac{c}{a}}$ $\geq$ $\frac{5}{2}$
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