Sequences and Series Review Sheet Answers



Sequences and Series Review Sheet Answers

4. arithmetic

d = 4

16, 20

5. geometric

r = 5

2,500, 12,500

6. neither

[pic]

7. arithmetic

d = −9

−30, −39

8. arithmetic

d = 8

34, 42

9. neither

25, 36

10. geometric

r = −2

16, −32

11. geometric

[pic]

[pic]

12. [pic]

un = 10n + 18 n ≥ 1

u12 = 138

13. [pic]

un = −100n + 62 n ≥ 1

u12 = −1138

14. [pic]

un = −10n − 24 n ≥ 1

u12 = −144

15. [pic]

un = 4n + 31 n ≥ 1

u12 = 79

16. [pic]

un = 6n − 11 n ≥ 1

u12 = 61

17. [pic]

un = 200n − 238 n ≥ 1

u12 = 2162

18. [pic]

[pic]

u5 = 1250

19. [pic]

[pic]

u5 = −243

20. [pic]

[pic]

u5 = −6

21. [pic]

[pic]

u5 = −96

22. [pic]

[pic]

u5 = 162

23. [pic]

[pic]

[pic]

24. 84

25. −4

26. [pic]

27. 36

28. 130

29. 1316

30. 228

31. 21

32. 1350

33. 4475

34. 511

35. 171

36. 63

37. −62

38. [pic]

39. [pic] or 152.25

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