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seen Dec 8 '12 at 17:12

Nov
25
accepted Questions about derivative (related rates)
Nov
25
comment Questions about derivative (related rates)
It's my homework but you know, not just two. The problems is solved, thanks so much!
Nov
25
asked Questions about derivative (related rates)
Nov
10
awarded  Student
Nov
10
awarded  Scholar
Nov
10
comment On the class $A=\{x\mid x\text{ is not an element of }x\}$
Haha, understand after knowing what's Russell paradox, It's a funny story and thanks so much!
Nov
10
accepted On the class $A=\{x\mid x\text{ is not an element of }x\}$
Nov
10
asked On the class $A=\{x\mid x\text{ is not an element of }x\}$