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If x is positive

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by sakurle » Sat Sep 05, 2009 6:48 pm
If x is positive which of the following is correct ordering of 1/x, 2x, and x^2

I. x^2, 2x, 1/x
II. x^2, 1/x, 2x
III. 2x, x^2, 1/x

A. None
B. I only
C. III only
D. I & II only
E. I, II & III
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by tom4lax » Sat Sep 05, 2009 6:54 pm
IMO, B
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by bharathh » Sat Sep 05, 2009 6:55 pm
Ans is A

It is not possible to determine the order. First of all it does not mention if the numbers should be sorted in a descending manner or ascending.

Even if it means smallest to largest, ordering them is not possible.

You get a diff order if you take x=1/10, x=1 and x=2
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by srivas » Sat Sep 05, 2009 10:25 pm
X is positive means it may be 1, 2, 3, .... or fractions also

SO the right choice is A
Gmat710,, Hyd
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by sakurle » Sun Sep 06, 2009 7:35 am
I had chosen None option as well, but it is not correct. The question is from GMAT Prep, so hopefully source is correct.
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