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[组合] 新年一题

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大佬最帅 posted 2022-1-1 12:01 |Read mode
Screenshot_20220101_120313_edit_519625915128522.jpg
求解

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hbghlyj posted 2022-1-1 15:42

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original poster 大佬最帅 posted 2022-1-3 18:37
回复 2# hbghlyj
幂级数,有点高级,有啥简便方法

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