It is currently 23 Mar 2018, 00:07

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If K is not equal 0,1 or -1 , Is 1/K>0 1) 1/k-1 > 0 2)

Author Message
Manager
Joined: 19 Oct 2008
Posts: 91
If K is not equal 0,1 or -1 , Is 1/K>0 1) 1/k-1 > 0 2) [#permalink]

### Show Tags

14 Mar 2009, 13:54
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

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

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

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Director
Joined: 01 Apr 2008
Posts: 846
Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
Re: DS GMAT Prep - Inequalities [#permalink]

### Show Tags

15 Mar 2009, 03:11
Should be A.
1/k-1 > 0 => denominator is +ve => k-1 >0 => k>1 => 1/k >0

1/k+1 > 0 => k+1 > 0 => k>-1 => 1/k may or may not be >0.
Intern
Joined: 07 Feb 2009
Posts: 47
Re: DS GMAT Prep - Inequalities [#permalink]

### Show Tags

15 Mar 2009, 07:53
I agree with u Economist.
If we consider second case/ statement, we get k>-1 , which means k can be a positive or a negative number, depends whether it falls into (-1,0) or [0, any +ve no).
Intern
Joined: 25 Dec 2008
Posts: 18
Schools: HBS, Stanford
Re: DS GMAT Prep - Inequalities [#permalink]

### Show Tags

15 Mar 2009, 09:49
I think it is D

1) see explanation above

2) means: k+1 > 0 thus k > -1 => k must be 2 or greater (as 0 and 1 are not allowed per instructions). For all those cases 1/k > 0 => sufficient
Manager
Joined: 19 Oct 2008
Posts: 91
Re: DS GMAT Prep - Inequalities [#permalink]

### Show Tags

16 Mar 2009, 09:31
If K>-1, it can be -0.8 since K is not necessarily an integer. Therefore, statment 2 is not sufficient. OA is A.
Manager
Joined: 19 Aug 2006
Posts: 232
Re: DS GMAT Prep - Inequalities [#permalink]

### Show Tags

16 Mar 2009, 14:03
Accountant wrote:
If K is not equal 0,1 or -1 , Is 1/K>0

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

It's A.

1. 1/k>1 suff.
2. 1/k>-1 not suff. (it does not say that k must be an integer)

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS GMAT Prep - Inequalities   [#permalink] 16 Mar 2009, 14:03
Display posts from previous: Sort by