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original poster: lemondian

[不等式] 请教一个不等式

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original poster lemondian posted 2017-10-16 16:09

回复 20# kuing

唉。。。。
那么16#的做法可以吧？
只不过。。。

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kuing posted 2017-10-16 16:12

回复 21# lemondian

方法是OK的，计算没问题就行，我没去验算你的过程，我当时没换元直接就导了……

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