Use the definition of the derivative (don't be tempted to take shortcuts!) to find the derivative of the function
f(x) = \sqrt{9 + 3x}.
Then state the domain of the function and the domain of the derivative.
Note: When entering interval notation in WeBWork, use I for $\infty$, -I for $-\infty$, and U for the union symbol. If the set is empty, enter "{}" without
the quotation marks.
f'(x) =
Domain of f(x) =
Domain of f'(x) =