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hieuquyen

hieuquyen

Member Since 27-05-2005
Offline Last Active 22-08-2005 - 11:12

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thi tỉnh Hà Nam

07-08-2005 - 10:55

Tìm tất cả các số nguyên dương http://dientuvietnam...n/mimetex.cgi?n sao cho $a(b+c)^n+b(c+a)^n+c(a+b)^n \geq 0 \forall a,b,c \in R$

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