2. 外语
  3. If (x-1)2=144, which of the following could be the value of 2x?

If (x-1)2=144, which of the following could be the value of 2x?

admin2011-01-18  55
问题 If (x-1)2=144, which of the following could be the value of 2x?
选项 A、-26
B、-22
C、-11
D、12
E、13
答案B
解析 Since there are only two possible values of 2x, it’s easiest to start with them and find one that is also in the answer choices. Since (x-1)2 could equal either 12 or -12, x could equal 13 or -11, which means that 2x could equal either 26 or -22. Of the answers, only B will work.
转载请注明原文地址:https://www.kaotiyun.com/show/KPtO777K
本试题收录于： GMAT QUANTITATIVE题库GMAT分类
0

GMAT QUANTITATIVE

GMAT

相关试题推荐
随机试题
最新回复(0)