Function f is a function with inverse f^{ -1}. Function h is defined by h(x) = f(x) + k where k is a constant. Express the inverse function of h in terms of f^{ -1} and k.

Function f is a function with inverse f^{ -1}. Function h is defined by h(x) = A*f(x - h) + k where A, k and h are constants. Express the inverse function of h in terms of f^{ -1}, A, k and h.