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[不等式] 双3元一次不等式

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wanhuihua posted 2017-8-4 16:27 |Read mode
Last edited by hbghlyj 2025-3-19 19:12设 $a, b, c, x, y, z$ 为正数
求证
\[
\max \left(\frac{a}{b}+\frac{b}{c}+\frac{c}{a}, \frac{x}{y}+\frac{y}{z}+\frac{z}{x}\right) \geq \frac{a+x}{b+y}+\frac{b+y}{c+z}+\frac{c+z}{a+x}
\]
Wanhuihua 20170527

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