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inequalities

by shamanth » Wed Dec 14, 2011 11:38 am
I tried searching the posts but couldn't find so I hope someone can help me out.

If K is not equal to 0, 1, or -1, is 1/k>0

(1) 1/(k-1)>0

(2) 1/(k+1)>0

many thanks
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Source: — Data Sufficiency |
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by GMATGuruNY » Wed Dec 14, 2011 11:57 am
I posted an explanation here:

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