I think there is a problem
回: paciii, f-ooo. I think paciii's answer 0.25, is most likey the rite answer -- sigmaxi	回复	线索的首篇	信息区

作者: Nono ® 02/18/2009, 19:52:26 作者简介 电邮作者 修改

with the posted solution. The original sum is not absolutely convergent. The sum is similar to the sum of (-1)^n/n from 1 to infinity, which is not absolutely convergent. hence you can not take the sum apart into two.

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It was treated as two finite sums, and represent the sums as integrals, then --- f-000 ( 02/18/2009, 20:12:03 ) ( 189 bytes ) +1 You will have problem getting a finit limit as n goes to infinity --- Nono ( 02/18/2009, 20:38:37 ) ( 19 bytes )