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GMAT Prep question:

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Senior | Next Rank: 100 Posts
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GMAT Prep question:

by thumpin_termis » Mon Jun 04, 2007 5:26 pm
I'm not sure if I understand why the answer is |x|/x. Is it simply to cover both the positive and the negative bases?

In other words, is |x|/x essentially the same as +/- 1?
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Junior | Next Rank: 30 Posts
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by plodder_81 » Mon Jun 04, 2007 7:50 pm
well you are right sqr rt (x ^ 2) = |x| or in other words -x when x <0 and x when x > 0. which leads to +1 or -1 for your answer
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