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[数列] 数列不等式

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史嘉 posted 2013-12-24 11:58 |Read mode
Last edited by 史嘉 2013-12-24 12:06已知$c_1=\frac{1}{2}\,,c_{n+1}=c_n*(c_n+1)$,证明:$1<\sum_{i=1}^n\frac{1}{1+c_i}<2$

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original poster 史嘉 posted 2013-12-24 12:07
终于调试好了,除了Σ的上下标,应该能看懂的,谢谢!

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爪机专用 posted 2013-12-24 12:10
不是吧,如此FAQ,你混论坛这么久难道没见过? 倒数裂项。

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original poster 史嘉 posted 2013-12-24 18:15
回复 3# 爪机专用


    哦?

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kuing posted 2013-12-24 19:02

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original poster 史嘉 posted 2013-12-24 22:18
回复 5# kuing

咋记住的都是。

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