For first time, make a guess $1000/(1+10%)~909. Next time, take another factor of 1/(1+10%), etc.
回复:让人烦恼的礼金卡问题
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回复:回复:让人烦恼的礼金卡问题
-火球魔法-
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01/06/2009 postreply
01:54:19
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回复:回复:回复:让人烦恼的礼金卡问题
-justatry-
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01/06/2009 postreply
21:45:31