It is currently 22 Nov 2017, 00:54

### 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 3^x - 3^x-1 ,then x(x-1) = ? 1. 12 2. 16 3. 20 4. 30 5.

Author Message
Manager
Joined: 23 Jan 2008
Posts: 108

Kudos [?]: 98 [0], given: 0

If 3^x - 3^x-1 ,then x(x-1) = ? 1. 12 2. 16 3. 20 4. 30 5. [#permalink]

### Show Tags

04 Feb 2008, 15:09
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If 3^x - 3^x-1 ,then x(x-1) = ?

1. 12
2. 16
3. 20
4. 30
5. 81

Last edited by blog on 05 Feb 2008, 11:27, edited 1 time in total.

Kudos [?]: 98 [0], given: 0

Director
Joined: 05 Jan 2008
Posts: 684

Kudos [?]: 619 [0], given: 0

### Show Tags

04 Feb 2008, 23:44
Could you post the question again, I think the question is incomplete
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Kudos [?]: 619 [0], given: 0

CEO
Joined: 29 Mar 2007
Posts: 2553

Kudos [?]: 528 [0], given: 0

### Show Tags

05 Feb 2008, 09:56
blog wrote:
If 3 power x - 3 power x-1 ,then x(x-1) = ?

1. 12
2. 16
3. 20
4. 30
5. 81

Ya I agree something is missing. Also can you use ^ for powers? Ex: 4 power 2 is 4^2.

Kudos [?]: 528 [0], given: 0

Re: x(x-1) ?   [#permalink] 05 Feb 2008, 09:56
Display posts from previous: Sort by

# If 3^x - 3^x-1 ,then x(x-1) = ? 1. 12 2. 16 3. 20 4. 30 5.

Moderator: chetan2u

 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®.