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Is |x| < 1 ?
Obi
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Post Posted: Sat Aug 02, 2008 5:44 pm Reply with quote
Is |x| < 1 ?

(1) |x + 1| = 2|x – 1|

(2) |x – 3| > 0

Can somebody explain why A is not sufficient in a logical fashion.
Guest
Post Posted: Mon Aug 04, 2008 7:26 pm Reply with quote
|x + 1| = 2|x – 1|

(x+1)=2(x-1)

or

(x+1)=-2(x-1)

then x=3 or x=1/3

so (2) is insufficient
Ron Purewal
MGMAT STAFF

Joined: 08 Oct 2007
Posts: 2277
Post Posted: Thu Sep 04, 2008 6:37 am Reply with quote
http://www.manhattangmat.com/forums/absolute-value-question-bank-t3648.html
Is |x| < 1 ?
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