1. See Fig. 15
3. a. b.
5.
7. If is differentiable, then and is undefined.
9. .
Then and .
11. Then , and root
13. so we can use . If , then the iterates . If , then . If , then the iterates .
15. and Then .
17. so .
Then .
19. (a) .
(b)
21. (a) If , then stretches to twice its value, .
(b) .