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标题: [求助]05.8math57 [打印本页]

作者: ghfgss231 时间: 2005-8-21 05:38 标题: [求助]05.8math57

57、DS: somebody invested 17,000, interest rate x% simply rate and have Z dollor interest, what would he have to invest in a account which has y% interest rate, simple rate so that he can have same interest. A. X=2 B Y=50%X

SA: B

想问dollar interest是不是应有时间在内啊？dollar interest=principal*interest rate*time,1年和2年拿到的dollar interest应该不一样多啊。

作者: assfgrtrtr 时间: 2005-8-21 18:38

时间都一样，均为一年

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