英语听力论坛's Archiver

xln1120 发表于 2009-5-19 16:39

此所谓囧函数

y=1/(x^2-1)
[img]http://gg.a.5d6d.com/userdirs/a/d/jjws/attachments/month_0905/20090518_417438b494d94c74bf2bgV9VvZZ9qG8z.gif[/img]

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