For f(x) and g(x) given in Problems following questions, find

(a) (f + g) (x)

(b) (f - g) (x)

(c) (f ( g) (x)

(d) (f / g) (x)

1. f(x) = 3x g(x) = x3

2. f(x) = (x g(x) = 1/x

3. f(x) = (2x g(x) = x2

4. f(x) = (x - 1)2 g(x) = 1 - 2x