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已知正数$a,b,c,d$,证明:$(\dfrac{a}{b+c+d})^\dfrac{3}{4}+(\dfrac{b}{c+d+a})^\dfrac{3}{4}+(\dfrac{c}{ ... 力工 发表于 2018-7-13 21:36
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2025-7-15 14:47 GMT+8
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