Q AA RX ... OTO calculator to estimate the x-coordinates of the inflection 7-30. For each function: a. Make a sign diagram for the first derivative. b. Make a sign diagram for the second derivative. c. Sketch the graph by hand, showing all relative extreme points and inflection points. 19. f(x) = x(x - 3)2 20. f(x) = x3(x -4) 21. f(x) = x3/5 22. f(x) = x1/5 23. f(x) = 5x4+ 2 24. f(x) = 5/x2 - 1 25. f (x) = Vx3 26. f(x) = Vx5 27. f(x) = (x - 1)2 28. f(x) = Vx+ 2+3 29. f (x) = 2 30. f(x) = - 54(x2 - 1) x2 + 27 Acept at undefined. 31-40. Graph each function using a graphing calculator b f(0) = -1 187 /552 10745 9 tv