Question

Which of the following could be an example of a function with a range (-∞,a) and a domain (b,∞)where a < 0 and b < 0?

A. f(x)=-√(x+b)-a
B. f(x)=-3√(x+a)-b
C. f(x)=3√(x-b)+a
D. f(x)=√(x-a)+a

Answer 1

Easy way to think of this is to see what would happen when you choose a negative number for 'a' and a negative number for 'b'.

If that isn't clear, then you should graph them :-)