It is currently 18 Nov 2017, 20:49

### 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 a and b are nonzero integers, which of the following must

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Intern
Joined: 26 Jun 2012
Posts: 24

Kudos [?]: 138 [0], given: 1

Location: Germany
GMAT 1: 570 Q31 V39
GMAT 2: 710 Q43 V44
If a and b are nonzero integers, which of the following must [#permalink]

### Show Tags

20 Jul 2013, 10:12
7
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

58% (00:54) correct 42% (00:55) wrong based on 312 sessions

### HideShow timer Statistics

If a and b are nonzero integers, which of the following must be negative?

A. $$(-a)^{-2b}$$
B. $$(-a)^{-3b}$$
C. $$-(a^{-2b})$$
D. $$-(a^{-3b})$$
E. None of these
[Reveal] Spoiler: OA

Last edited by kingflo on 20 Jul 2013, 10:37, edited 2 times in total.

Kudos [?]: 138 [0], given: 1

Math Expert
Joined: 02 Sep 2009
Posts: 42249

Kudos [?]: 132626 [1], given: 12326

Re: If a and b are nonzero integers, which of the following must [#permalink]

### Show Tags

20 Jul 2013, 10:34
1
KUDOS
Expert's post
4
This post was
BOOKMARKED
If a and b are nonzero integers, which of the following must be negative?

A. $$(-a)^{-2b}=\frac{1}{(-a)^{2b}}=positive$$.

B. $$(-a)^{-3b}$$ --> may be positive (consider a=1 and b=2) as well as negative (consider a=1 and b=1).

C. $$-(a^{-2b})=-\frac{1}{a^{2b}}=-\frac{1}{positive}=negative$$

D. $$-(a^{-3b})$$ --> may be positive (consider a=-1 and b=1) as well as negative (consider a=1 and b=1).

E. None of these

_________________

Kudos [?]: 132626 [1], given: 12326

Non-Human User
Joined: 09 Sep 2013
Posts: 15704

Kudos [?]: 282 [0], given: 0

Re: If a and b are nonzero integers, which of the following must [#permalink]

### Show Tags

25 Aug 2014, 11:07
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.
_________________

Kudos [?]: 282 [0], given: 0

Non-Human User
Joined: 09 Sep 2013
Posts: 15704

Kudos [?]: 282 [0], given: 0

Re: If a and b are nonzero integers, which of the following must [#permalink]

### Show Tags

20 Mar 2016, 10:32
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.
_________________

Kudos [?]: 282 [0], given: 0

Non-Human User
Joined: 09 Sep 2013
Posts: 15704

Kudos [?]: 282 [0], given: 0

Re: If a and b are nonzero integers, which of the following must [#permalink]

### Show Tags

04 Apr 2017, 00:01
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.
_________________

Kudos [?]: 282 [0], given: 0

Re: If a and b are nonzero integers, which of the following must   [#permalink] 04 Apr 2017, 00:01
Display posts from previous: Sort by

# If a and b are nonzero integers, which of the following must

 new topic 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®.