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Member Since 29-10-2009
Offline Last Active 31-10-2010 - 00:43

25-11-2009 - 00:22

có N hok bạn

đề chính xác rồi đấy anh!

21-11-2009 - 23:34

giải bất phương trình :
$ (x^{2}+y^{2}+2)^{x^{4}+y^{4}}> (x^{4} +y^{4} +2)^{x^{2}y^{2}} $

sao đềrắc rối was ta

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