国际顶尖MBA申请交流平台--TOPWAY MBA

标题: 请求高手帮助!题目都看不懂！ [打印本页]

作者: fengzhecool 时间: 2007-10-9 20:47 标题: 请求高手帮助!题目都看不懂！

题目是这样的

The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. if the concentration of chemical B is increased by 100 percent, which of the following is closet to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?

the right answer is "40% increase"

题目怎么读都不知道在说什么。请高手指点！

作者: ecsniffers 时间: 2007-10-12 20:59

up,ding !!!!!!

作者: bmp3 时间: 2007-10-26 17:13

原题是说：
x·x+y 能够称反应式
现在y用量变成2倍，要求反应式比例不变。
即： 2X·X+2y
所以x用量为根号2倍X，与原先用量x相比则是：根号2-1=1.414-1=40%

[em01]

作者: shawlen 时间: 2007-12-15 10:15 标题: 原为AA/B，B变2B，A变为根号2*A，根号2-1=41%（约为40）

[em01]

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