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GMAT Prep - Num props

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GMAT Prep - Num props

by rosh26 » Sun Sep 07, 2008 9:49 am
Please explain. Why isn't 1 correct?
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by klamation » Sun Sep 07, 2008 3:44 pm
1 is correct for x > 0. However, if x < 0, the answer would be -1. Therefore E is correct.
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by rosh26 » Mon Sep 08, 2008 4:42 pm
What would be the algabraic method to solve this question?
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by just_do_it » Mon Sep 08, 2008 5:12 pm
one algebric method i can think of is as follows

sqrt(x) = +x or -x
which can be represented in absolute terms as |x|
hence sqrt(x)/x= |x|/x

hope this helps.
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