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Chris Peckover
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Oct 13 to Jan 7, 2027

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Logan Thompson
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Sep 6 to Dec 6, 2026

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Expert replies
Source: — Problem Solving |

by sparsh.21 » Sat Oct 04, 2008 11:27 am
no takers ??
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by 4meonly » Sat Oct 04, 2008 11:37 am
PLEASE POST DS QUESTIONS IN DS SECTION

(1)
1/(k-1)>0
k-1>0
k>1, means that k is always positive
if k>1, then 1/k >0 because 1 and k are positive
SUFF

(2)
1/(k+1)>0
k+1>0
k>-1
k can be as negative from -1 to 0 as positive from 0
INSUFF


A
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by sparsh.21 » Sat Oct 04, 2008 11:47 am
i ll do it from next time....

thanks 4 d explanation !!
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