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悠闲数学娱乐论坛(第3版)
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悠闲数学娱乐论坛(第3版)
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v6mm131
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Post time 2015-10-1 22:24
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求证对于任意实数$\alpha ,\beta $都存在无穷多个正整数$n$满足$sin^2n\alpha +sin^2n\beta <\frac{2π^2}{n}$
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悠闲数学娱乐论坛(第3版)
2025-3-6 17:07 GMT+8
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