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Junior | Next Rank: 30 Posts
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by ricaototti » Thu Sep 04, 2008 7:42 pm
is /x/ <1? (please consider the / / as the absolute value signal

1 /x +1/ = 2 /x-1/

2 /x-3/different from 0


Is there any other way of solving it without squaring both sides on1? Could I square both sides if it was a inequality?

About how many question on the GMAT are on abs value? About how many on inequalities?

Thanks!
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Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
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by P_mashru » Thu Sep 04, 2008 10:10 pm
Option 1:

by considering modes on both sides as +ve, we are getting x as 3 & -3
by considering modes on either side as +ve, we are getting x as 1/3 & -1/3

Ambiguous and hence not sufficient

Option 2:
/x-3/ is not equal to 0
means x is not equal to 3

not sufficient

Joining option 1 & 2
sufficient as /x/ = 1/3

IMO c. What is OA?
I am I
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