so find the domain of both functions and you should have everything.
the domain is the set of all x-values for which the function is defined. so find what x's we CANNOT have, and then the domain is all x's but those. (Hint: what can we not do with a fraction?)
note, the range is the set of y-values for which the function is defined. so when stating the range, make sure to do it in terms of y