Cho $a,b,c>0$ thỏa mãn $a+b+c=3$.
Chứng minh rằng $\sqrt[3]{a}+\sqrt[3]{b}+\sqrt[3]{c}+5\geq (a+b)(b+c)(c+a)$ 
Edited by Mia Mtk, 01-05-2018 - 15:38.
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Started By Mia Mtk, 01-05-2018 - 15:15
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Posted 01-05-2018 - 15:15
Mia Mtk
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