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  1. 12) a) [(1/29)².(1/29)³]¹/⁵
  2. [(1/29)⁵]¹/⁵
  3. 1/29
  4.  
  5. b) [(3/14)⁵:-(3/14)³]⁻¹
  6. [(3/14)²]⁻¹
  7. (3/14)⁻²
  8. (14/3)²
  9. 196/9
  10.  
  11. c) a³.a⁷.a⁻³.a⁵/a⁴.a⁶.a⁻⁸.a⁹
  12. a¹²/a¹¹
  13.  
  14. 13) a) 3x-2≤4
  15. 3x≤4+2
  16. 3x≤6
  17. x≤2
  18.  
  19. b) -3x+2≥4
  20. -3x≥4-2
  21. -3x≥2
  22. x≤2/3
  23.  
  24. c) 4(5x-3)≤104-9x
  25. 20x-12≤104-9x
  26. 20x-9x≤104+12
  27. 29x≤116
  28. x≤4
  29.  
  30. d) 5x/3-1/6≤x/4-4
  31. 20x-2≤3x-48
  32. 20x-3≤-48+2
  33. 17x≤-46
  34. x≤-46/17
  35.  
  36. e) 3x+5>4-7x
  37. 3x+7x>4-5
  38. 10x>-1
  39. x>-1/10
  40.  
  41. f) 1-2x>2x-1
  42. -2x-2x>-1-1
  43. -4x>-2
  44. x<1/2
  45.  
  46. g) 3(4-x)≥18x+5
  47. 12-3x≥18x+5
  48. -3x-18x≥5-12
  49. -21x≥-7
  50. x≤1/3
  51.  
  52. h) 5x-6/4≥3x-12
  53. 5x-6≥12x-48
  54. 5x-12x≥-48+6
  55. -7x≥-42
  56. x≤6
  57.  
  58. 14) a) x = h.2
  59. b)
  60. c)
  61. d)
  62.  
  63. 15) a con 3
  64. b con 4
  65. c con 5
  66. d con 1
  67. e con 2
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