回复：回复：回复：回复：让人烦恼的礼金卡问题

来源: 于 2010-03-12 23:36:33 [旧帖] [给我悄悄话] 本文已被阅读：次

I think your formula has a typo. instead, it should be:
ExpectReturn(1) = max (t*(1-t) + t*0.9ExpectReturn(1))