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# Another Gmat Prep P.S.

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Manager
Joined: 11 Sep 2008
Posts: 57

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22 Feb 2009, 02:06

What is it not 1?? Why the absolute value? that allows |X|/X to possibly be negative. Wouldn't that be impossible??

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SVP
Joined: 07 Nov 2007
Posts: 1756
Location: New York
Re: Another Gmat Prep P.S. [#permalink]

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22 Feb 2009, 06:36
BuddaBelly wrote:

What is it not 1?? Why the absolute value? that allows |X|/X to possibly be negative. Wouldn't that be impossible??

sqrt(N) --> always postive ( in GMAT)

when x<0
sqrt(x^2) = -x (+ve)

sqrt(x^2)/x = -x/x

when x>0
sqrt(x^2)/x = x/x

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Manager
Joined: 17 Dec 2008
Posts: 165
Re: Another Gmat Prep P.S. [#permalink]

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22 Feb 2009, 08:50
Yes E.

x2 > 0 ( From $$sqrt(x^^2)$$ > 0 )
i.e x > 0 or x = $$modulo(x)$$/x

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Re: Another Gmat Prep P.S.   [#permalink] 22 Feb 2009, 08:50
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# Another Gmat Prep P.S.

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