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关于轮换代数方程组的各种坑的讨论

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血狼王 posted 2016-5-4 07:54 |Read mode
先从一道数列题开始:
若数列$\an$满足
$$a_n=(a_{n-1}-a_{n-2})^2,$$
问:$\an$可不可以为周期为$r$的周期数列?
(讨论$r=3,r=5$的情形)

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original poster 血狼王 posted 2016-5-4 07:54
你们可以试着找几个数,看看对不对
我只能说:
$r=3$的很简单,$r=5$的很难。

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