In fact ,you can say any nuber.In this case we have to use highe

來源: 於 2010-09-07 20:16:01 [舊帖] [給我悄悄話] 本文已被閱讀：次

No matter how long the a1,a2,...an are, we can't let a(n+1)being unique. So the Rguy's Q is not good in Math.But for fun,this is good Q.