n=2,your first Q is wrong. In fact t, you can choice any (n-1)

Eqs by Math beauty.My answer is good for my copy and that every factor is same as what.Please see my last deduce.

所有跟帖: 

I have realized that it is wrong. -皆兄弟也- 給 皆兄弟也 發送悄悄話 皆兄弟也 的博客首頁 (0 bytes) () 09/14/2010 postreply 10:53:35

請您先登陸,再發跟帖!