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

It is currently 23 Oct 2014, 04:51

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

Function

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 12 Feb 2008
Posts: 182
Followers: 1

Kudos [?]: 33 [0], given: 0

Function [#permalink] New post 23 Sep 2008, 06:10
Please give detailed explanation, i will follow with the OA.

Function f(x) satisfies f(x) = f(x^2) for all x . Which of the following must be true?


* f(4) = f(2)f(2)
* f(16) - f(-2) = 0
* f(-2) + f(4) = 0
* f(3) = 3f(3)
* f(0) = 0
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3403
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 164 [0], given: 2

Re: Function [#permalink] New post 23 Sep 2008, 06:21
if f(x)=f(x^2) then f(-2)=f(4)...if f(4) then assume if x=4 then f(4)=f(4^2) i.e f(16)..

I will go with B..
Manager
Manager
avatar
Joined: 22 Jul 2008
Posts: 154
Followers: 1

Kudos [?]: 8 [0], given: 0

Re: Function [#permalink] New post 23 Sep 2008, 07:13
f(-2) = f(4) = f(16)
Hence, f(-2) = f(16)
f(16) - f(-2) = 0
Ans. is B
Manager
Manager
avatar
Joined: 12 Feb 2008
Posts: 182
Followers: 1

Kudos [?]: 33 [0], given: 0

Re: Function [#permalink] New post 24 Sep 2008, 04:28
KASSALMD wrote:
f(-2) = f(4) = f(16)
Hence, f(-2) = f(16)
f(16) - f(-2) = 0
Ans. is B



Why do you square twice.

f(-2)=f(4) and thats it.
where does f(16) come from. i understand that f(4)=f(16) but the question says only that f(x)=f(x^2)...........
SVP
SVP
avatar
Joined: 17 Jun 2008
Posts: 1578
Followers: 12

Kudos [?]: 186 [0], given: 0

Re: Function [#permalink] New post 25 Sep 2008, 11:41
elmagnifico wrote:
KASSALMD wrote:
f(-2) = f(4) = f(16)
Hence, f(-2) = f(16)
f(16) - f(-2) = 0
Ans. is B



Why do you square twice.

f(-2)=f(4) and thats it.
where does f(16) come from. i understand that f(4)=f(16) but the question says only that f(x)=f(x^2)...........


What f(x) = f(x^2) means that f(2) = f(4) = f(16) = f(256) = ........

Hence, one can use f(16) in place of f(4).
Re: Function   [#permalink] 25 Sep 2008, 11:41
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Functions....... pzazz12 3 01 Oct 2010, 03:37
Functions burnttwinky 1 10 Dec 2009, 16:11
Functions study 3 13 Oct 2009, 11:15
Functions manojgmat 3 29 Sep 2009, 11:12
functions ritula 3 08 Feb 2009, 23:09
Display posts from previous: Sort by

Function

  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®.