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Pls help

by raju232007 » Tue Sep 23, 2008 9:51 pm
1. Is (1/p)>(r/r^2+2)
(1)p=r
(2)r>0

OG is C

2. Is sqrt(x-5)^2=5-x
(1) -x|x|>0
(2) 5-x>0


OG is D

Can u provide explanation for the above 2 ques? appreciate your help
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Source: — Data Sufficiency |
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by kris610 » Wed Sep 24, 2008 4:18 pm
2) If you simplify the question, it becomes x-5 = 5-x i.e. is x=5?

A) tells you that x < 0.

B) tells you that x < 5.

Each imply that x != 5. so D.
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