Find all School-related info fast with the new School-Specific MBA Forum

It is currently 21 Oct 2014, 11:08

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If c and d are both positive integers greater than 1 and c^d

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 14 [0], given: 0

If c and d are both positive integers greater than 1 and c^d [#permalink] New post 29 Oct 2006, 09:43
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If c and d are both positive integers greater than 1 and c^d = (1/c)^3d-8, what is the value of c^d?

(1) c=4
(2) d=c^0.5
_________________

Impossible is nothing

Director
Director
avatar
Joined: 01 Oct 2006
Posts: 500
Followers: 1

Kudos [?]: 16 [0], given: 0

 [#permalink] New post 29 Oct 2006, 09:49
We are c^d = (1/c)^3d-8... c^4d-8=1
thus 4d-8=0 d=2
St1..gives us value of C we can find c^d -..suff
st2 ..gives us the value of C we can c^d--suf

Thus answer is D
Senior Manager
Senior Manager
avatar
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 14 [0], given: 0

 [#permalink] New post 29 Oct 2006, 09:55
yogeshsheth, in your computation you equated 4d-8 to 0. But you can also equate it to any number since 1 raised to any number is still 1.
_________________

Impossible is nothing

Director
Director
avatar
Joined: 01 Oct 2006
Posts: 500
Followers: 1

Kudos [?]: 16 [0], given: 0

 [#permalink] New post 29 Oct 2006, 10:00
Hermione wrote:
yogeshsheth, in your computation you equated 4d-8 to 0. But you can also equate it to any number since 1 raised to any number is still 1.


Hermione its given that c and d are numbers and greater than 1. So
if x>1 then only x^0=1.
Thus have equated 4d-8=0.
Senior Manager
Senior Manager
avatar
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 14 [0], given: 0

 [#permalink] New post 29 Oct 2006, 10:02
Got it. Many thanks :-D
_________________

Impossible is nothing

  [#permalink] 29 Oct 2006, 10:02
    Similar topics Author Replies Last post
Similar
Topics:
C/D = 9.75 When dividing positive integer C by positive goodyear2013 2 05 Aug 2014, 10:31
1 Experts publish their posts in the topic If f and g are both positive integers greater than 1 Gnpth 3 25 Jul 2014, 10:00
2 Experts publish their posts in the topic If a, b, and c are each positive integers greater than 1 is devinawilliam83 3 04 Mar 2012, 22:29
are positive integers p and q both greater than n? 1. el1981 1 05 Feb 2008, 21:24
If c and d are integers, is c even? (1) c(d + 1) is even. nick_sun 7 15 Apr 2007, 23:34
Display posts from previous: Sort by

If c and d are both positive integers greater than 1 and c^d

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.