Board logo

标题: GWD 19-11 [打印本页]

作者: forgetviviva    时间: 2006-8-14 06:54     标题: GWD 19-11

Q11:

If |x| < 1?

(1)  |x + 1| = 2|x - 1|

(2)    |x - 3| 0

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Answer: C

Thanks!


作者: sunjueliang    时间: 2006-8-15 20:44

条件1两边平方得到一个一元二次方程,解此方程得x=1/3或者x=3,再结合条件2,可以知道|x|&lt;1
作者: asasasas1    时间: 2006-8-16 13:23

請問是否在任何同樣情況下也可用一元二次方程找答案?
作者: mjiirggh    时间: 2006-8-18 22:22

要保证解没有改变(没有增加和减少)




欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) Powered by Discuz! 7.2