It is currently 17 Oct 2017, 16:10

### 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 n is a positive integer, is the value of b - a at least

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 22 Jan 2005
Posts: 36

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

Location: New York, NY
If n is a positive integer, is the value of b - a at least [#permalink]

### Show Tags

10 Feb 2006, 20:14
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (01:03) wrong based on 3 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If n is a positive integer, is the value of b - a at least twice the value of 3^n - 2^n?

(1) a = 2^(n+1) and b = 3^(n+1)

(2) n = 3

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

Intern
Joined: 07 Jan 2006
Posts: 49

Kudos [?]: 6 [0], given: 0

### Show Tags

10 Feb 2006, 20:46
(1) Sufficient. It will always be almost 3x the value as n goes to infinity.

(2) Insufficient since we do not know a and b.

(A)

Kudos [?]: 6 [0], given: 0

VP
Joined: 29 Dec 2005
Posts: 1339

Kudos [?]: 69 [0], given: 0

Re: DS - Exponential equations [#permalink]

### Show Tags

10 Feb 2006, 21:44
arichards728 wrote:
If n is a positive integer, is the value of b - a at least twice the value of 3^n - 2^n?

(1) a = 2^(n+1) and b = 3^(n+1)

(2) n = 3

1. the least +ve integer value for n = 1 tells us that (b-a) is more than two times of (3^n - 2^n). so i is enough.

2. is not. therefore,

A.

Kudos [?]: 69 [0], given: 0

Re: DS - Exponential equations   [#permalink] 10 Feb 2006, 21:44
Display posts from previous: Sort by

# If n is a positive integer, is the value of b - a at least

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.