****GMAT PREP Brain Buster**** F(A+B)=....

[Guest]

For which of the following functions is F(A+B) = F(A) + F(B) for all positive numbers A and B?


A) F(X) = X^2

B) F(X) = X + 1

C) F(X) = Square Root X

D) F(X) = 2/X

E) F(x) = -3X


Highlight the text below this line for the answer
ANSWER E


Where do you even start with something like this?

[Guest]

Found it....my apologies!


http://www.manhattangmat.com/forums/for ... t2795.html

[rfernandez]

Glad you found it.

Reminder: we have two dedicated forums for GMAT Prep questions. This forum is for general quant questions only. Thanks!