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[不等式] n元最值一道

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Shiki posted 2020-1-18 20:03 |Read mode

正实数n个，$a_1a_2….a_n＝1$
求$\sum_{i=1}^n (\frac{1}{1+a_i})^n$的最小值

= =

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2025-6-8 07:04 GMT+8

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