GWD28-34

meckychen · 发表于 2010-1-26 12:53:54

Q34:

The operation Θ is defined by x Θ y =1/x+1/y
for all nonzero numbers x and y. If z is a number greater than 1, which of the following must be true?

I. x Θ (-z
) = 0

II. z Θ[Z/(z-1)] = 1

III. 2/ZΘ2/z = z

A. I only
B. I and II only

C. I and III only
D. II and III only
E. I, II, and III
Answer:E

Why not D, thank you
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xiaoqiaoli · 发表于 2011-7-15 17:55:40

题目搞错了吧~~

把A中的x改成z就可以选E了~如果不改，我觉得就应该选D的~~

GWD28-34

所属分类: GMAT考试

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