515 16. ƒ1x2 = ln 0 x2 - 50 17. ƒ1x2 = e x2+x+4 18. ƒ1x2 = x3 - 1 x2 - 1 19. ƒ1x2 = B -1 x3 - 1 20. ƒ1x2 = B3 1 x3 - 8 21. ƒ1x2 = ln 1x2 + 12 22. ƒ1x2 = 21x - 321x + 221x - 42 23. ƒ1x2 = log a x + 2 x - 3b 2 24. ƒ1x2 = 212 14 - x221x + 32 25. ƒ1x2 = e0 1/x0 26. ƒ1x2 = 1 0 x2 - 70 27. ƒ1x2 = x100 - x50 + x2 + 5 28. ƒ1x2 = 2-x2 - 9 29. ƒ1x2 = 24 16 - x4 30. ƒ1x2 = 23 16 - x4 31. ƒ1x2 = Bx2 - 2x - 63 x2 + x - 12 32. ƒ1x2 = 25 5 - x 33. ƒ1x2 = P 25 - x P 34. ƒ1x2 = B -1 x - 3 35. ƒ1x2 = log` 1 4 - x ` 36. ƒ1x2 = 6 x2-9 37. ƒ1x2 = 6 2x2-25 38. ƒ1x2 = 6 23 x2-25 39. ƒ1x2 = ln a -3 1x + 221x - 62 b 40. ƒ1x2 = -2 log x Determine which one of the choices (A, B, C, or D) is an equation in which y can be written as a function of x. 41. A. 3x + 2y = 6 B. x = 20 y 0 C. x = 0 y + 30 D. x2 + y2 = 9 42. A. 3x2 + 2y2 = 36 B. x2 + y - 2 = 0 C. x - 0 y 0 = 0 D. x = y2 - 4 43. A. x = 2y2 B. x = log y2 C. x3 + y3 = 5 D. x = 1 y2 + 3 44. A. x2 4 + y2 4 = 1 B. x = 5y2 - 3 C. x2 4 - y2 9 = 1 D. x = 10 y 45. A. x = 2 - y y + 3 B. x = ln 1y + 122 C. 2x = 0 y + 10 D. 24 x = y2 46. A. ey2 = x B. ey+2 = x C. e 0 y0 = x D. 10 0 y+20 = x 47. A. x2 = 1 y2 B. x + 2 = 1 y2 C. 3x = 1 y4 D. 2x = 1 y3 48. A. 0 x 0 = 0 y 0 B. x = 0 y2 0 C. x = 1 y D. x4 + y4 = 81 49. A. x2 4 - y2 9 = 1 B. y2 4 - x2 9 = 1 C. x 4 - y 9 = 0 D. x2 4 - y2 9 = 0 50. A. y2 - 21x + 222 = 0 B. y - 21x + 222 = 0 C. y6 - 21x + 122 = 0 D. y4 - 2x2 = 0 Summary Exercises on Functions: Domains and Defining Equations
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