Is recommended. Let f(x) = sec(x) = x. (a) Find f'(x). f'(x) = (b) Check to see that your answer to part (a) is reasonable by graphing f and f' for |x| < 7 6 7 6- 5 5 5 4 4- 3 3 3 2 f 2 -1 -2- -3- -4 -5 -6 -7 -8 QO -2 -2 -6 -7 8 Describe the relationship between the two graphs. Note that f=0 where f has a minimum. Also note that f' is negative when fis decreasing and f' is positive when fis increasing. O Note that f=0 where fhas a minimum. Also note that f' is positive when fis decreasing and f' is negative when fis increasing. Note that f=0 where f' has a minimum. Also note that f' is decreasing when fis negative and f' is increasing when fis positive. Note that f'=0 where f has a maximum. Also note that f' is negative when fis decreasing and f' is positive when fis increasing. -7