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[数列] $\frac{1}{n}a_{n+1}=a_n^2+2n,a_1=5$能求通项及和吗？

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郝酒 posted 2022-2-2 17:58 |Read mode

RT，感觉递推公式有了平方，就不好弄了呀。归纳都不好归纳。

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kuing posted 2022-2-2 18:01

扔了吧，我不信能求

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original poster 郝酒 posted 2022-2-2 19:01

唔，谢谢ku版

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2025-7-15 15:03 GMT+8

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