“当N为无穷大时”，改为当N趋向无穷大时 - N恒为有限值。

来源: 淘金客于 2013-02-28 08:30:08 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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“当N为无穷大时”， 改为当N趋向无穷大时 - N恒为有限值。