一道GMAT数学题目

来源：百度知道 编辑：UC知道 时间：2024/05/12 14:45:15
the rate of a certain 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 bu 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?

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C = A^2/B
当B变成 2B 时，为了保证C不变，A就要变成 根号2A。