jj 135 please help

bmwedward · 发表于 2008-8-22 17:13:00

Dear NNs,

135. x<0?

(1) x²<x³

(2) x³<x⁴

the answer is A, but how about x=1/2 or 1/3, doesn't support (1)

please help me, thanks!

spoiltgirl · 发表于 2008-8-22 18:02:00

U should make clear who support who? It's a DS question, (A) means statement (1) alone is sufficient.

xygoal · 发表于 2008-8-22 20:03:00

考虑条件1，x^2>0，所以得出x>1,则可以推出题目啊。

g4yLee · 发表于 2008-8-23 15:25:00

(1) 推出：x>1 可以推出题干x<0不成立

(2) 推出：x>1,or x<0 无法判定题干正确与否（eg. 5,-5同时满足条件2）

zolanda9293 · 发表于 2008-8-25 01:23:00

1)推出X>0 2)推出X>0或X<0 ,1)+2) X>0 答案是E

[此贴子已经被作者于2008-8-25 1:30:35编辑过]

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