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Source: — Data Sufficiency |
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Re: GMATPrep Question

by jayhawk2001 » Tue Apr 17, 2007 9:34 pm
rajesh_ctm wrote:Is 1/p > r/(r^2 + 2) ?

(1) p = r
(2) r > 0
1 - insufficient. Take p = r = 2, we get 1/2 > 1/3
For p = r = -2, we get -1/2 < -1/3

2 - insufficient. We know nothing about p

Combining 1 and 2, we know that r > 0 and p = r. For all positive values
of p (=r), 1/p > r/(r^2 + 2)

Hence C
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by krishnamurthyu » Fri Aug 10, 2007 6:25 pm
Is 1/p > r/(r^2 + 2) ?

(1) p = r
(2) r > 0

Given:
1/p > r/(r^2+2)
(r^2+2)>pr

1.Sufficient: when p=r
= (r^2+2)> r.r
=(r^2+2> r^2 where r={-n,0,n)
Answer: A or D
2. r>0 : no information on P. Not sufficient

Answer:A.
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