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[不等式] 三次根式不等式

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成龙之龙 posted 2015-9-2 19:12 |Read mode
a,b,c>0, prove: $\sum a\sqrt[3]{a+b}\ge\sqrt[3]{\sum a(a+b)(ab+8c^2)}$.
请继续!

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original poster 成龙之龙 posted 2015-9-7 16:59
?????没人做吗?

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kuing posted 2015-9-7 20:22
没什么好想法……三次根还轮换,太难入手……

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