I'm having trouble finding the domain and range of a function composition.
$f(x) = x^2 - 3x$
$g(x) = \sqrt{x}$
$(g \circ f)(x) = g(f(x)) = \sqrt{(x^2 - 3x)}$
How do I find the domain and range of $(g \circ f)(x)$?
(I know the answer because it's in the back of the book, but please tell me how?)
Thanks in advance!