新GRE数学 For which of the following sets of numbers is the product of the three numbers less
题目
新GRE数学 For which of the following sets of numbers is the product of the three numbers less
For which of the following sets of numbers is the product of the three numbers less than each member of the set?
Ⅰ1/4,2/3,3/4 Ⅱ-1/2,-1,4 Ⅲ -2,3,5
A Ⅰonly BⅡonly C Ⅲ only DⅠand Ⅲ E Ⅱand Ⅲ
答案
下面哪组数字中三个数字的乘积比其中的任一个数字都小?
I：三数乘积为1/8,比1/4,2/3,3/4中的任意一个都小
II：三数乘积为2,比-1/2和-1都大
III：三数乘积为-30,比-2,3,5都小
所以符合题干要求的有I 和III,选择D选项.
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