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力工 发表于 2022-10-21 12:57 类似题: 已知$x>0,y>0$,求$(x+y)^2+\frac{1}{(x+y)^2}+\frac{1}{y^2}+\frac{1}{x^2}$的最小值。 ...
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2025-7-15 13:56 GMT+8
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