标题: 请教几个数学问题 [打印本页] 作者: ypl214 时间: 2010-7-21 13:04 标题: 请教几个数学问题 1For every positive integer n,the function h(n) is defined to be the product of all the even integers from 2 to n.If p is the smallest prime of h(100)+1,then p is A between 2 and 10 B between 10 and 20 C between 20 and 30 D between 30 and 40 E greater than 40 2 The rate of a certain reaction id directly proportional to the square of the chemical A present and inversely propotional to the concentration of chemical B present.If the concentration chemical B is increased by 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?