Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 23 May 2013, 05:15
Customize  |  Hide

Search
Register
New posts
Unanswered

F(x) = x/(x+1). What is f(1/x) in terms of f(x)? f(x) -f(x)

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2797
Location: New York City
Followers: 5

Kudos [?]: 132 [0], given: 4

GMAT Tests User
F(x) = x/(x+1). What is f(1/x) in terms of f(x)? f(x) -f(x) [#permalink] New post 12 Nov 2007, 14:44
F(x) = x/(x+1).
What is f(1/x) in terms of f(x)?

f(x)
-f(x)
1/f(x)
1-F(x)
none of the above

can someone give me a step by step breakdown? I got stuck after 1/(1+x)
Senior Manager
Senior Manager
User avatar
Joined: 01 Sep 2006
Posts: 308
Location: Phoenix, AZ, USA
Followers: 1

Kudos [?]: 4 [0], given: 0

GMAT Tests User
Re: Challenge - function [#permalink] New post 12 Nov 2007, 14:48
bmwhype2 wrote:
F(x) = x/(x+1).
What is f(1/x) in terms of f(x)?

f(x)
-f(x)
1/f(x)
1-F(x)
none of the above

can someone give me a step by step breakdown? I got stuck after 1/(1+x)


f(1/x) = (1/x)/((1/x)+1)==> 1/(1+x)

trying chice D 1-Fx

1- x/(1+x)=== > x+1-x/(1+x)===> 1/(1+x)

so we can see f(1/x)= 1/(1+x) == 1-f(x)

Answe D
Current Student
Joined: 28 Dec 2004
Posts: 3439
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 11

Kudos [?]: 134 [0], given: 2

GMAT Tests User
 [#permalink] New post 12 Nov 2007, 20:52
after you have broken down to (1/1+x)

test a number, say x=2...

f(2)=2/3

f(1/2)=1/3

which is same as 1-f(x)...

D it is..
Director
Director
Joined: 09 Aug 2006
Posts: 776
Followers: 1

Kudos [?]: 18 [0], given: 0

GMAT Tests User
 [#permalink] New post 12 Nov 2007, 21:31
fresinha12 wrote:
after you have broken down to (1/1+x)

test a number, say x=2...

f(2)=2/3

f(1/2)=1/3

which is same as 1-f(x)...

D it is..


Solved it the same way to get D.
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2797
Location: New York City
Followers: 5

Kudos [?]: 132 [0], given: 4

GMAT Tests User
 [#permalink] New post 15 Nov 2007, 03:16
fresinha12 wrote:
after you have broken down to (1/1+x)

test a number, say x=2...

f(2)=2/3

f(1/2)=1/3

which is same as 1-f(x)...

D it is..


thanks. very helpful
  [#permalink] 15 Nov 2007, 03:16
    Similar topics Author Replies Last post
Similar
Topics:
 New posts For which of the following functions f is f(x) = f(1 - x) Folaa3 6 21 Aug 2005, 19:27
New posts For which of the following functions is f(x) = f(1-x) for mophead 6 01 Sep 2005, 06:14
New posts For which of the following functions f is f(x)= f(1-x) for njss750 3 20 Nov 2005, 06:33
New posts f(x) = x^2 / (x^4 - 1) What is f(1/x) in terms of f(x)? f -f bmwhype2 5 16 Nov 2007, 08:16
New posts f = (x^4 - 1)/(X^2) What is f(1/x) in terms of f(x)? f -f bmwhype2 1 19 Nov 2007, 10:02
Display posts from previous: Sort by

F(x) = x/(x+1). What is f(1/x) in terms of f(x)? f(x) -f(x)

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com