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[不等式] 一道寂寞的三元分式不等式

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Shiki Posted 2020-1-10 18:59 |Read mode

$a,b,c$是正实数

求证

$$\sum \frac{a^3}{b^2-bc+c^2}\geqslant a+b+c$$

= =

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kuing Posted 2020-1-10 19:15

老题……《撸题集》P.815 题目 6.1.13

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