Suppose that the functions f and g are defined for all real numbers x as follows. f(x) = 4x 8 (x) =x Write the expressions for (g-f) (x) and (g .f) (x) and evaluate (g+f) (-1). (8 - f) (x) = 1 (8.f) (x) = 1 X (8 + f ) (-1) = 0