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[不等式] n元分式不等式

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hbghlyj posted 2021-2-13 13:37 |Read mode
Last edited by hbghlyj 2021-5-10 23:34设$a_1\geq a_2\geq\cdots\geq a_n\geq0$.且$\sum_{i=1}^{n}a_i^2=1$.求证:$\sum_{i=1}^{n}\frac{a_i}{\sqrt i+\sqrt{i-1}}\geq1.$
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