作者gs86137 (小飞鱼)
看板trans_math
标题Power Series
时间Tue Jun 8 23:32:31 2010
1. Determine the interval of convergence of ∫f(x) dx
∞ (-1)^n (x - 2)^n
if f(x) = Σ ---------------------
n = 1 n
∞ (x-2)^n
2.Determine the interval of convergence of the series Σ ------------
n = 1 n ·3^n
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◆ From: 140.128.194.71
1F：→ dali510313:1.用ratio 应该就可以了吧? 140.133.9.152 06/09 01:56
2F：→ dali510313:第二题也是用ratio吧= =" 140.133.9.152 06/09 01:58
3F：推 s23325522:喜欢的话 也可以用根值140.115.213.154 06/09 04:49
4F：推 s23325522:根值与比值审练基本上是等价的140.115.213.154 06/10 00:16
5F：推 math1209:不. 这两个审敛法并不等价. 114.32.219.116 06/10 00:21