Find f(x) and f-1(E) for each of the following.
a) f(x) = 2 - 3x, E = (-1, 2)
b) f(x) = x2 + l, E = (-l, 2]
c) f(x) = 2x - x2, E = [-2, 2)
d) f(x) = log(x2 - 2x + 2), E = (0, 3]
e) f(x) = cos x, E = [0, ∞)