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v6 21:26:14 kk这玩意怎么证明?
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感觉和这题:已知$a,b,c>0,abc=1$,则$\Sigma \frac{a^a+b^b}{1+c}\geqslant 3$ 有点亲戚关系。 ... 力工 发表于 2019-11-14 21:00
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2025-7-21 12:08 GMT+8
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