Answer Happy

(4) (10 pts) For f(x) = x² - 2x + 5, find its derivative by using the formal (limit) definition of the derivative. Note: You must show all your work to get credit. You will NOT get credit for using derivative rules other than the definition of the derivative.
(6) (10 pts) For f(x) = -³, find the critical values of z, and determine the relative maxima and minima, horizontal point of inflection.0,25 parts (7a) (9 pts) Consider the function f(x) = 23-322 +2. Find f"(0) and f"(2). Deter- mine whether the function f(x) is concave up or concave down at z = 0 and x = 2.