If k not equal to 0, 1 or -1 is 1/k>0? (1) 1/(k-1) >0 : DS Archive - Page 2
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# If k not equal to 0, 1 or -1 is 1/k>0? (1) 1/(k-1) >0

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SVP
Joined: 05 Jul 2006
Posts: 1743
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Kudos [?]: 317 [0], given: 49

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22 Oct 2006, 10:39
Hong , thanks a lot for ur help......... u ve this magic touch explaining things in very simple logocal way which could be understood by anyone.

thanks for ur valuable time
Manager
Joined: 04 May 2006
Posts: 173
Location: paris
Followers: 1

Kudos [?]: 29 [0], given: 0

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23 Oct 2006, 04:16
[quote="ugo_castelo"]I pick B
Since K>0 so 1/K>0
a. not suf, if K=- 0,5, equation holds true and K<0
b. suf, K has to be greater than 1[/quote]

small mistake...
I flipped the choices
a. suf, K has to be greater than 1[/quote]
b. not suf, if K=- 0,5, equation holds true and K<0

so the answer is A
_________________

time is not on my side

23 Oct 2006, 04:16

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# If k not equal to 0, 1 or -1 is 1/k>0? (1) 1/(k-1) >0

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