Chapter 4, page 23

1. (a) -4, 3, 10. (b) -19, -23, -27.

3. (a) 990. (b) 993. (c) 988.

5. 33/2.

7. (a) -33,698. (b) 501,994. (c) -11,385/4. (d) n².

9. 54, 1458, 13122.

11. 686, 4802, 33614.

13. 

15. (a) (7¹⁰⁰⁰ -1)/6. (b) (1 - 7¹⁰⁰⁰)/8. (c) (7ⁿ - 1)/6.

17. 9.

21. (a)  (b)  (c) 4. (d) 4.

23. 30.

27. (xⁿ⁺¹ - yⁿ⁺¹)/(x - y).

29. (a) 5. (b) 24 miles per hour.

31. 2[1 - (1/2)⁷].

35. (a) 0, 3, 5, 6, 9, 10, 12, 15, 18, 20, 21, 24, 25, 27, 30.

(b) 15. (c) 15. (d) 
 

Sunday, March 15, 1998