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11 Sep 2008, 03:58
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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Is |x-1| 0
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11 Sep 2008, 08:41
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jjhko
1: -2 < x < 2. nsf
2: x < -1 or x > 1. x cannot be 1. nsf.
togather also insuff...
so //E//
11 Sep 2008, 09:15
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Is |x-1|< 1 ?
(1) (x-1)^2 <= 1
(2) x^2 - 1 > 0
1) x=1.5, but then |x-1|<1; if x=2 the |x-1|=1 so Insuff
2) x^2 >1
which means x<-1 or x>1
if x<0 then |x-1|>1 if x>1 could be 1.5 then |x-1|<1 so insuff
1 and 2 together; if x>1 say x=1.5 then |x-1|<1 if x=2 then |x-1|>1
E it is
(1) (x-1)^2 <= 1
(2) x^2 - 1 > 0
1) x=1.5, but then |x-1|<1; if x=2 the |x-1|=1 so Insuff
2) x^2 >1
which means x<-1 or x>1
if x<0 then |x-1|>1 if x>1 could be 1.5 then |x-1|<1 so insuff
1 and 2 together; if x>1 say x=1.5 then |x-1|<1 if x=2 then |x-1|>1
E it is
