3x2 - 1 4. (a) Use the quotient rule to find f'(x) where f (r) = x2 + 1+ 2 (b) Find the equation of the tangent line to the curve y = (2r' + 2r + 1)(-r' + 2x2 - 1) at x = 0. (c) Find g'(x), g"(x) and g" (x) when g(x) = -x5 + 14 - 312 + 27r. (d) If h(2) = 2, h'(2) = -3, k(2) = 5, k'(2) = 3, find ( ) (2). (e) Find f'(x) when f(x) = cos(r) + 2 cos(x) sin(x)