In Exercises 45 and 46 (as opposed to Exercises 7 and 8), the viewing rectangles do...

In Exercises 45 and 46 (as opposed to Exercises 7 and 8), the viewing rectangles do not show all of the essential features of the graphs. In each case, use a graphing utility and experiment with different viewing rectangles to determine approximate x- and y-coordinates for all turning points. What are the corresponding intervals of increase and decrease for the function?