Exercises 19.2, page 521

  1. 1. 243

  2. 3. 6400, 1600, 400, 100, 25

  3. 5. 16 ,  12 ,  32 ,  92 ,  272

  4. 7. 128

  5. 9. 1125

  6. 11. 100729

  7. 13. 1

  8. 15. 3418

  9. 17. 762

  10. 19. 3(210 − k10)16(2 + k)

  11. 21. a6 = 64 ,  S6 = 136516

  12. 23. a1 = 16 ,  a5 = 81

  13. 25. a1 = 1 ,  r = 3

  14. 27. n = 7 ,  Sn = 58,593625

  15. 29. Yes; r = 3x ;  a20 = 319x + 1

  16. 31. 5

  17. 33. x2[ 1 − ( − x)n] x + 1

  18. 35. 1.4%

  19. 37. 1.09 mA

  20. 39. $366.76

  21. 41. 5800 ° C

  22. 43. 43%

  23. 45. $13,947

  24. 47. $671,088.64

  25. 49. The 5% bonus, $1,609,564.06 more

  26. 51. 0.25 ft

  27. 53. Yes, the ratio is squared.

  28. 55. 8, 1,  − 6 ;  8, 16, 24; 1,  − 6 ,  36; 16, 24, 36

Get Basic Technical Mathematics, 11th Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.