Inequality

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Source: — Data Sufficiency |

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by harshavardhanc » Sat May 01, 2010 11:46 pm
jainrahul1985 wrote:Is |x|< 1?
(1) |x + 1| = 2|x - 1|
(2) |x - 3| ≠ 0
Ans. C
statement 1 :

after squaring both the sides and simplification, we get :

(x-1/3)(x-3) = 0 OR x = 1/3 or 3

hence, the statement is not sufficient.

Statement 2 says :

x ≠ 3 , hence not sufficient.

Combining :

we get, x =1/3 , which is sufficient to tell the answer.

Hence, C
Regards,
Harsha