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

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Senior Manager
Joined: 08 Aug 2005
Posts: 251

Kudos [?]: 67 [0], given: 0

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

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03 Apr 2006, 04:07
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 the positive numbers a and b?

f(x)=x^2
f(x)=x+1
f(x)=sqrt x
f(x)=2/x
f(x)=-3x

Kudos [?]: 67 [0], given: 0

Senior Manager
Joined: 22 Jun 2005
Posts: 360

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

Location: London

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03 Apr 2006, 06:23
f(a+b)=-3(a+b)=f(a) + f(b)

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

03 Apr 2006, 06:23
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# For which of the following functions is f(a+b)=f(a)+f(b) for

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