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[不等式] 新春小试牛刀

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wanhuihua

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wanhuihua posted 2018-2-17 14:59 |Read mode
Last edited by hbghlyj 2025-3-19 18:53设 $a, b, c$ 为正数且 $\sum a b=3$ 求证$$\sum_{\text {cyc}} \frac{a}{7 a^2+4 b^2+3} \leq \frac{3}{14}$$
（20180217）
三元不等式

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wanhuihua

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original poster wanhuihua posted 2018-2-20 21:58
ok1.jpg 回复 1# wanhuihua

这个解法后来想到的，系数是为另外一种方法设计的，谁来玩玩
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