Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 23 May 2017, 21:34

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# For which of the following functions is f(a+b) = f(a) + f(b)

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 12 Feb 2006
Posts: 26
Followers: 0

Kudos [?]: 12 [0], given: 0

For which of the following functions is f(a+b) = f(a) + f(b) [#permalink]

### Show Tags

06 Mar 2006, 16:32
1
This post was
BOOKMARKED
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b?

f(x) = x^2

f(x) = x+1

f(x) = squareroot x

f(x) = 2/x

f(x) = -3x
Manager
Joined: 04 Jan 2006
Posts: 58
Followers: 1

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

### Show Tags

06 Mar 2006, 16:58
f(x) =-3x

Suppose a = 3 and b=2
f(5) = -15
f(3) = -9
f(2) = -6
f(5) = f(3 )+ f(2)

None of the other functions satisfies this condition.
06 Mar 2006, 16:58
Display posts from previous: Sort by

# For which of the following functions is f(a+b) = f(a) + f(b)

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.