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DS Gmat prep 2 question Inqualities

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Source: — Data Sufficiency |
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by xcusemeplz2009 » Wed Sep 30, 2009 10:39 am
1) 1/(k-1) >0 is possible only if k>1
for any value of k>1 ;1/k>0
this we can find by plugging some smallest even fractional -ve value for K
so suff.

2) if k=-1/2 then case is true but 1/k<0
and if k=1/2 then the given case is true but 1/k>0
so not suff.

so A is correct
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