标题: [数学] 2008-5-13 [打印本页]

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作者: 老猫    时间: 2008-5-13 07:01     标题: 2008-5-13

[attach]142472[/attach].

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作者: ITmeansit    时间: 2008-5-13 11:18

=1/2-1/2003!.

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