bacali Master | Next Rank: 500 Posts View User Profile Posts: 245 Joined: Thu Aug 16, 2007 12:41 pm Question 5 (nov. 15TH) by bacali » Sat Nov 15, 2008 4:56 pm 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) = root(x) f(x) = 2/root(x) f(x) = -3x OA: E Top Quote