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标题: 求解一道数学题！！ [打印本页]

作者: sjmdlycs 时间: 2010-11-1 06:53 标题: 求解一道数学题！！

Before being simplified, the instruction for computing income tax in Country R were to add 2 percent of one's annual income to the average of 100 units of County R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in County R's currency, for a person in that country whose annual income is I?答案是：50+I/40
这道题目应该怎么理解啊？标记的那句话我不明白是什么意思，式子要怎么列呢？！
求NN帮助！！

作者: IMARCUS 时间: 2010-11-1 20:33

2%I + (100+1%I)/2

作者: michael_wind 时间: 2010-11-2 21:19

这道我前天好像刚刚做过
就是他的税收方法是
百分之2的个人年收入加上100货币值和百分之一年收入的平均值
就是2%I+（100+1%I）/2
=1/50I+50+1/200I
=50+1/40I

作者: sjmdlycs 时间: 2010-11-3 06:32

原来是这个意思，灰常感谢！！

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