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

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.

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• In fact ,you can say any nuber N，只要您能说出道理.比如 -皆兄弟也- ♂ (102 bytes) () 09/08/2010 postreply 08:25:37