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标题: [求助]GWD29-36 [打印本页]

作者: hedongshi 时间: 2006-8-25 13:20 标题: [求助]GWD29-36

Q36:

Is x > 5 ?

(1) x² > 25

(2) 2x + 7 > 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

答案是C,可我觉得B就可以推出来啊

作者: xiongxiong88 时间: 2006-8-26 07:11

(2)     2x + 7 > 0  ONLY 推出 x > -7/2  !!!

作者: hedongshi 时间: 2006-8-28 06:42

是啊，要是x〉-7/2，不是一定大于5了吗？？

作者: observer 时间: 2006-8-28 13:21

5>x>-3.5or x>5不对

作者: WTO 时间: 2006-8-29 19:25

拜托,大于一个负数不一定就大于一个正数

作者: hedongshi 时间: 2006-9-24 13:42

thanks ,又钻牛角尖了!!

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