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[数列] 数列不等式疑问

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力工 posted 2023-7-8 20:49 |Read mode
这是我在看书时遇到的,请大佬们评判一下:
已知数列${a_n}:a_1\geqslant 3,a_{n+1}=a_n^2-na_n+1$,看见一本资料上说可以证明:$\frac{1}{a_n+1}\leqslant \frac{1}{2^{n+1}}$.对吗?如果对,又如何证明?谢谢!

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kuing posted 2023-7-8 21:58
数归试过没?

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original poster 力工 posted 2023-7-9 20:01
没有,不知道下手哇呢。

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kuing posted 2023-7-10 19:03
力工 发表于 2023-7-9 20:01
没有,不知道下手哇呢。
平时怎么数归的,现在就怎么入手呗,有什么困难吗?

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