回复:他的方法没用Ceva's theorem,非常简单
The solution you posted used Ceva's Theorem. It is easy to prove though.
所有跟帖:
• Not mine, It's from 欢乐的爸爸 in 数学启智,etc group -flagsix- ♂ (99 bytes) () 03/14/2014 postreply 07:00:10