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Member Since 02-01-2017
Offline Last Active 08-01-2017 - 10:12

03-01-2017 - 12:42

CHO a>=b>=c ( a;b;c dương ) a^2+b^2+c^2=3 CMR (a/b+2)+(b/a+2)+(c/a+2)<=1

GIÚP E VS NHÁ

02-01-2017 - 21:32

e chưa hỉu cách đăng bài ntn

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