Let f x x a Simplify Computing derivatives using the limit definition f 13 h f 13 h Algebraically simplify your answer until you have cancelled out the factor of h in the denominator Hint See Problem 9 on Assignment 2 2 for similar computations b Evaluate lim f 13 h f 13 h 0 h If an answer does not exist enter DNE y c Determine the equation of the line tangent to y f x at x 13