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[不等式] 菜鸟求解答

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qinxianming82 posted 2016-6-16 14:51 |Read mode

$已知：a+b+c=3,求证（a^2b+b^2c+c^2a)(ab+bc+ca)<=9

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kuing posted 2016-6-16 14:53

见《撸题集》第 900 页题目 6.7.15.

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original poster qinxianming82 posted 2016-6-16 15:00

谢谢！但是我不知道什么是撸题集

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kuing posted 2016-6-16 15:03

看论坛置顶帖。

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original poster qinxianming82 posted 2016-6-16 15:04

我在网上找到了，十分感谢！您的功力真深厚！

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2025-7-15 15:27 GMT+8

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