GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 Aug 2018, 19:13

### 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

# What is the value of 3^-(x + y) / 3^-(x - y)? (1) x = 2 (2)

Author Message
Senior Manager
Joined: 08 Jun 2004
Posts: 483
Location: Europe
What is the value of 3^-(x + y) / 3^-(x - y)? (1) x = 2 (2)  [#permalink]

### Show Tags

05 May 2006, 20:51
1
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 34 sessions

### HideShow timer Statistics

What is the value of 3^-(x + y) / 3^-(x - y)?
(1) x = 2
(2) y = 3

--== 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.
VP
Joined: 29 Dec 2005
Posts: 1318
Re: DS: value of 3^-(x+y).  [#permalink]

### Show Tags

05 May 2006, 21:49
2
M8 wrote:
What is the value of 3^-(x + y) / 3^-(x - y)?
(1) x = 2
(2) y = 3

= 3^-(x + y) / 3^-(x - y)
= 3^(x - y)/3^(x + y)
= 3^x 3^-y/3^x 3^y
= 1/ 3^2y

so 2 is suff. B.
Director
Joined: 10 Oct 2005
Posts: 692

### Show Tags

05 May 2006, 21:56
A for me
3^-(x + y) / 3^-(x - y)={1/3^(x+y)}/{1/3^(x-y)}
=3^(x-y)/3^(x+y)=3^(x+y)*3^(x-y)=3^x+y+x-y=3^2x=3^4
_________________

IE IMBA 2010

Senior Manager
Joined: 08 Jun 2004
Posts: 483
Location: Europe

### Show Tags

06 May 2006, 10:07
Anybody else?
Manager
Joined: 27 Mar 2006
Posts: 135

### Show Tags

06 May 2006, 10:58
I agree with B
Intern
Joined: 14 Jan 2006
Posts: 20
Location: Visakhapatnam, India

### Show Tags

06 May 2006, 11:07
Yurik79 wrote:
A for me
3^-(x + y) / 3^-(x - y)={1/3^(x+y)}/{1/3^(x-y)}
=3^(x-y)/3^(x+y)=3^(x+y)*3^(x-y)=3^x+y+x-y=3^2x=3^4

The calculation done by you here is wrong. The X part gets cancelled rather than the Y. Hence 2nd stmt is sufficient.
Director
Joined: 10 Oct 2005
Posts: 692

### Show Tags

06 May 2006, 11:16
3^-(x + y) / 3^-(x - y)={1/3^(x+y)}/{1/3^(x-y)}
=3^(x-y)/3^(x+y)=3^(x+y)*3^-(x+y)
My fault))stupid mistake[/b]
Agree B it is
_________________

IE IMBA 2010

VP
Joined: 29 Apr 2003
Posts: 1375

### Show Tags

06 May 2006, 16:12
Agreed with B,,, Made stupid mistakes!
Manager
Joined: 09 Apr 2006
Posts: 173
Location: Somewhere in Wisconsin!

### Show Tags

06 May 2006, 16:22
Yes, it depends on the value of y. Answer is B.
_________________

Thanks,
Zooroopa

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 4939
Location: Singapore

### Show Tags

10 May 2006, 20:22
3^-(x + y) / 3^-(x - y)
= 1/3^(x+y) x 3^(x-y)
= 3^(x-y)/3^(x+y)
= 3^x(3^-y)/3^x(3^y)
= 1/3^2y

St1:
Insufficient.

St2:
Sufficient.

Ans B
Non-Human User
Joined: 09 Sep 2013
Posts: 7774
Re: What is the value of 3^-(x + y) / 3^-(x - y)? (1) x = 2 (2)  [#permalink]

### Show Tags

21 Sep 2017, 02:12
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.

--== 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: What is the value of 3^-(x + y) / 3^-(x - y)? (1) x = 2 (2) &nbs [#permalink] 21 Sep 2017, 02:12
Display posts from previous: Sort by

# Events & Promotions

 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®.