[数列] a+b

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student_qwh posted 2017-11-30 20:57 |Read mode

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kuing posted 2017-11-30 21:36

易知周期为3，计算前三项的和和积就是了

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original poster student_qwh posted 2017-12-1 19:29

46+11根号5吧

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2025-7-15 13:56 GMT+8

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