3. (6 points) Given f(x) = 6 - 4x + x2, a) Find the equation of the tangent line to f (x) at x=1. 3a) -6 -5 -4 -3 -2 -1 b) Sketch a graph of the f (x) function and the tangent line on the same set of axis. 4. (5 points) Given f(x) = 2 - 3x2, using the limit definition of derivative, find f'(x) . 5. (9 points) Find the domain of the following functions (in interval notation and in exact values): a) f (x) = 2-7 5a) b) g(x) = vx -2n 5b) c) h(x) = 5d)