12. Given the point ( 2, 1) on a tangent line to the curve f(x) = x2 - 2x + 5 find the point(s) where the tangent touches f(x). [5 Marks] Section 4: Application 13. Find the equation of the tangent to the function f (x) = + 4 x x 3 if x = 1. [6 Marks]