1. Consider these three one-to-one functions f : A - R defined by f(x) = x2 -9' g : B - R defined by g(x) = vx + 9, h : C - R defined by h = fog, where A, B, and C, are the maximal domains given by these definitions. (a) Determine A, B, and C. (b) Determine algebraic expressions for h(x) and h-(x) in the form of rational functions