Re: [级数] power series

楼主: Honor1984 (希望愿望成真)   2017-06-23 23:08:53
※ 引述《Guard3rd (我爸有台gtr)》之铭言:
: http://i.imgur.com/EfB30Gm.jpg http://i.imgur.com/mjO6m2h.jpg
: 想请问这两题power series 怎么求
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