GMAT Prep question:

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thumpin_termis: Senior | Next Rank: 100 Posts; Posts: 60; Joined: Fri Jun 01, 2007 11:02 pm

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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Source: Beat The GMAT — Problem Solving | Mon Jun 04, 2007 5:26 pm

plodder_81: Junior | Next Rank: 30 Posts; Posts: 14; Joined: Thu Mar 22, 2007 8:57 am; Location: Denver

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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