Calculus AP Edition 9th Edition Larson Solutions Manual
[Pages:102]Calculus AP Edition 9th Edition Larson Solutions Manual
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CHAPTER P Preparation for Calculus
Section P.1 Graphs and Models.................................................................................2 Section P.2 Linear Models and Rates of Change....................................................11 Section P.3 Functions and Their Graphs.................................................................23 Section P.4 Fitting Models to Data..........................................................................33 Review Exercises ..........................................................................................................35 Problem Solving ...........................................................................................................41
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CHAPTER P Preparation for Calculus
Section P.1 Graphs and Models
1. y
3 2
x
3
x-intercept: (2, 0)
y-intercept: (0, 3)
Matches graph (b).
2. y
9 x2
x-intercepts: 3, 0, 3, 0
y-intercept: (0, 3) Matches graph (d).
3. y 3 x2
x-intercepts: 3, 0 , 3, 0
y-intercept: (0, 3) Matches graph (a).
4. y x3 x
x-intercepts: 0, 0, 1, 0, 1, 0
y-intercept: (0, 0) Matches graph (c).
5. y
1 2
x
2
x 4 2 0 2 4
y0 1 234
7. y 4 x2 x 3 2 0 2 3 y 5 0 4 0 5
y
6 (0, 4)
2 (- 2, 0) -6 -4
-2
(- 3, - 5) -4 -6
(2, 0) x
46
(3, - 5)
8. y x 32
x01234 5 6 y94101 4 9
y
10 (0, 9)
8
(6, 9)
6
4 2
-6 -4 -2 -2
(1, 4) (5, 4) (2, 1)
(4, 1) x
246 (3, 0)
9. y x 2
y
6
4
(0, 2) (-2, 1)
(4, 4) (2, 3)
-4 -2 (- 4, 0) -2
x 24
6. y 5 2x
x
1
0 1 2
5 2
3
4
y 7 5 3 1 0 1 3
x 5 4 3 2 1 0 1 y3 2 1 0 1 2 3
y
6
(- 5, 3)
4
(1, 3)
(- 4, 2) 2 (0, 2)
(- 3, 1) -6 -4 (- 2, 0)
(- 1, 1) x
2
-2
y
8 (-1, 7)
(0, 5)
4
(1, 3)
2
(2, 1)
x
(
INSTRUCTOR -6 -4 -2
(3, - 1)
( - 2
-4
5, 0 2
(4, -3)
USE
ONLY
2
? 2010 Brooks/Cole, Cengage Learning
? Cengage Learning. All Rights Reserved.
NOT FOR SALE Section P.1 Graphs and Models 3
10. y x 1
x 3 2 1 0 1 2 3 y 2 1 0 1 0 1 2
y
4 3 (- 3, 2) 2 (- 2, 1)
-3 -2 (- 1, 0) -1
-2
(3, 2)
(2, 1)
x 1 23
(1, 0) (0, - 1)
14. y
1
x 2
x 6 4 3 2
1 0 2
y
1 4
1 2
1
y
5
( ) 4
3
0,
1 2
( ) (-1, 1) 2
2,
1 4
x
( ) -
6,
-
1 4
-1 -2
( ) -
4,
-
1 2
-3
(- 3, - 1) -4
-5
123
Undef. 1
1
1
2
4
11. y x 6 x 0 1 4 9 16 y 6 5 4 3 2
y
2
x
-4
4 8 12 16
-2
(9, -3) (16, -2)
-4
(4, -4)
(1, -5) -6 (0, - 6)
-8
12. y x 2
x 2 1 0
2 7 14
y0 1
2 23 4
15. Xmin 5 Xmax 4 Xscl 1 Ymin 5 Ymax 8 Yscl 1
Note that y 3 when x 0 and y 0 when x 1.
16. Xmin 20 Xmax 30 Xscl 5 Ymin 10 Ymax 40 Yscl 5
Note that y 16 when x 0 or 16.
y
5
4
(14, 4)
3 (- 1, 1)
2
(7, 3) (2, 2)
(0, 2 )
(- 2, 0)
x 5 10 15 20
13. y 3 x
x 3 2 1 0
12 3
y 1
3 2
3 Undef. 3
3 2
1
17. y 5 x
5 (-4.00, 3)
(2, 1.73)
-6
6
-3
(a) 2, y 2, 1.73 y
(b) x, 3 4, 3 3
5 2
5 4
3 | 1.73
18. y x5 5x
6
(-0.5, 2.47)
y
-9
9
( (
3 2 (- 3, - 1) 1
-3 -2 -1 -1 -2
(1, 3)
(2,
3 2
(3, 1)
x 123
(-
2,
-
3 2
(1, -4)
-6
(a) 0.5, y 0.5, 2.47 (b) x, 4 1.65, 4 and x, 4
1, 4
INSTRUCTOR (-1,-3) USE ONLY
? 2010 Brooks/Cole, Cengage Learning
? Cengage Learning. All Rights Reserved.
NOT FOR SALE 4 Chapter P Preparation for Calculus
19. y 2x 5 y-intercept: y x-intercept: 0 5 x
20 5
2x 5
2x
5
2
;
5 2
,
0
5; 0, 5
20. y 4x2 3 y-intercept: y
402 3
3; 0, 3
x-intercept: 0 4x2 3 3 4x2
None. y cannot equal 0.
21. y x2 x 2
y-intercept: y 02 0 2
y 2; 0, 2
x-intercepts: 0 0 x
x2 x 2
x 2x 1 2, 1; 2, 0, 1, 0
22. y2 x3 4x y-intercept: y2 y
03 40 0; 0, 0
x-intercepts: 0 0 x
x3 4x
xx 2x 2 0, r 2; 0, 0, r 2, 0
23. y x 16 x2 y-intercept: y 0 16 02
0; 0, 0
x-intercepts: 0 0 x
x 16 x2
x 4 x4 x 0, 4, 4; 0, 0, 4, 0, 4, 0
24. y x 1 x2 1
y-intercept: y 0 1 02 1 y 1; 0, 1
x-intercept: 0 x 1 x2 1 x 1; 1, 0
25. y 2 x 5x
y-intercept: None. x cannot equal 0.
x-intercept: 0
0 x
2 x 5x
2 x
4; 4, 0
x2 3x
26. y 3x 12
y-intercept: y y
02 30 ??30 1??2 0; 0, 0
x-intercepts: 0 0 x
x2 3x
3x 12
xx 3 3x 12
0, 3; 0, 0, 3, 0
27. x2 y x2 4 y 0
y-intercept: 02 y 02 4 y
y
0
0; 0, 0
x-intercept: x20 x2 40 0 x 0; 0, 0
28. y 2x x2 1
y-intercept: y 20 02 1 y 1; 0, 1
x-intercept: 0 2x x2 1
2x
x2 1
4x2 x2 1
3x2 1
x2 1 3
x r3 3
x
3 3
;
? ???
3 3
,
? 0???
Note: x 3 3 is an extraneous solution.
29. Symmetric with respect to the y-axis because
y x2 6 x2 6.
INSTRUCTOR USE ONLY ? 2010 Brooks/Cole, Cengage Learning ? Cengage Learning. All Rights Reserved.
NOT FOR SALE Section P.1 Graphs and Models 5
30. y x2 x No symmetry with respect to either axis or the origin.
31. Symmetric with respect to the x-axis because
y2 y2 x3 8x.
41. y 2 3x
Intercepts: 0, 2,
2 3
,
0
Symmetry: None
y
32. Symmetric with respect to the origin because
y x3 x
y x3 x y x3 x.
2 (0, 2)
1
(2 3
,
0
(
x
-1
23
-1
33. Symmetric with respect to the origin because
x y xy 4.
34. Symmetric with respect to the x-axis because
x y2 xy2 10.
35. y 4 x 3 No symmetry with respect to either axis or the origin.
36. Symmetric with respect to the origin because
x y 4 x2 0
xy 4 x2 0.
37. Symmetric with respect to the origin because
y
x
x2 1
x
y
x2
. 1
x2
38. y
is symmetric with respect to the y-axis
x2 1
because y
x2 x2 1
x2
x2
. 1
39. y x3 x is symmetric with respect to the y-axis
because y x3 x x3 x x3 x .
40. y x 3 is symmetric with respect to the x-axis because y x 3 y x 3.
42. y
3 2
x
6
Intercepts: 0, 6, 4, 0
Symmetry: None
y
8 6 (0, 6)
4
2
-2 -2
(4, 0) x
2468
43. y
1 2
x
4
Intercepts: 8, 0, 0, 4
Symmetry: none
y
2
-2 -2
(8, 0)
x
24
8 10
(0, - 4) -6 -8 - 10
44. y
2 3
x
1
Intercepts: 0, 1,
3 2
,
0
Symmetry: none
y
2
( ) 3 2
,
0
-1
(0, 1)
x 12
-1
-2
INSTRUCTOR USE ONLY ? 2010 Brooks/Cole, Cengage Learning ? Cengage Learning. All Rights Reserved.
NOT FOR SALE 6 Chapter P Preparation for Calculus
45. y 9 x2
Intercepts: 0, 9, 3, 0, 3, 0
Symmetry: y-axis
y
10 (0, 9)
6
4
2 (-3, 0) -6 -4 -2
-2
(3, 0) x
246
49. y x3 2
Intercepts: 3 2, 0 , 0, 2
Symmetry: none
y
5 4 3
(0, 2)
(- 3 2, 0) 1
-3 -2 -1
x 123
46. y x2 3 Intercept: (0, 3) Symmetry: y-axis
y
12
9
-6 -3
(0, 3)
x
3
6
47. y x 32
Intercepts: 3, 0, 0, 9
Symmetry: none
y
12 10
(0, 9) 8
2 -10 -8 -6 (- 3, 0)
-2
x 24
48. y 2x2 x x2x 1
Intercepts: 0, 0,
1 2
,
0
Symmetry: none
y
5
4
3
2
( ) -
1 2
,
0
1
(0, 0)
-3 -2 -1
x 123
50. y x3 4x
Intercepts: 0, 0, 2, 0, 2, 0
Symmetry: origin
y
3
(-2, 0)
(0, 0) (2, 0)
x
-3
-1
1
3
-1
-2
-3
51. y x x 5
Intercepts: 0, 0, 5, 0
Symmetry: none
y
3 2
(- 5, 0)
(0, 0)
x
-4 -3 -2 -1
12
-3 -4
52. y
25 x2
Intercepts: 0, 5, 5, 0, 5, 0
Symmetry: y-axis
y
7 6 (0, 5)
4
3
2
(- 5, 0) 1
(5, 0)
x
-4-3-2-1 1 2 3 4 5
-2 -3
INSTRUCTOR USE ONLY ? 2010 Brooks/Cole, Cengage Learning ? Cengage Learning. All Rights Reserved.
NOT FOR SALE Section P.1 Graphs and Models 7
53. x y3
Intercept: (0, 0) Symmetry: origin
y
4 3 2
(0, 0)
x
-4 -3 -2 -1
1234
-2 -3 -4
54. x y2 4
Intercepts: 0, 2, 0, 2, 4, 0
Symmetry: x-axis
y
3
(-4, 0) -5
(0, 2)
-2 -1
x 1
(0, -2)
-3
55. y 8 x
Intercepts: none
Symmetry: origin
y
8
6
4
2
x
-2
2468
10 56. y x2 1
Intercept: (0, 10) Symmetry: y-axis
y
12 10 (0, 10)
2 -6 -4 -2
x 246
57. y 6 x
Intercepts: 0, 6, 6, 0, 6, 0
Symmetry: y-axis
y
8
6
4
(-6, 0)
2
-8
-4 -2-2
-4
-6
-8
(0, 6) 24
(6, 0) x
68
58. y 6 x Intercepts: (0, 6), (6, 0) Symmetry: none
y
8 (0, 6)
4
2 (6, 0)
x 2468
59. y2 x 9 y2 x 9 y r x9
Intercepts: 0, 3, 0, 3, 9, 0
Symmetry: x-axis
4 (0, 3)
(- 9, 0)
- 11
1
(0, -3) -4
60. x2 4 y2 4 y r 4 x2 2
Intercepts: 2, 0, 2, 0, 0, 1, 0, 1
Symmetry: origin and both axes
Domain: >2, 2@
(-2, 0) -3
2
(0, 1) (2, 0)
3
(0, -1) -2
INSTRUCTOR USE ONLY ? 2010 Brooks/Cole, Cengage Learning ? Cengage Learning. All Rights Reserved.
8 Chapter P Preparation for Calculus
61. x 3y2 6 3y2 6 x y r 6x 3
Intercepts: 6, 0, 0, 2 , 0, 2
Symmetry: x-axis
3
(0, 2 )
(6, 0)
-1
8
(0, - 2 )
-3
62. 3x 4 y2 4y2
8 3x 8
y
r
3 4
x
2
Intercept:
8 3
,
0
Symmetry: x-axis
6
( ) 8 , 0 3
-6
12
65. x2 y x y 6 x2 0 0 x
6 y 6 x2 4 y 4x 4 x x2 x 2
x 2x 1
2, 1
The corresponding y-values are y 2 for x y 5 for x 1.
Points of intersection: 2, 2, 1, 5
2 and
66. x y
3 x 3 x
0 x
3 y2 y2 3 x x 1
x 12
x2 2x 1
x2 x 2 x 1x 2
1 or x 2
The corresponding y-values are y 2 for x 1 and y 1 for x 2.
Points of intersection: 1, 2, 2, 1
-6
63. x y 8 y 8 x 4x y 7 y 4x 7 8 x 4x 7 15 5x 3x The corresponding y-value is y 5. Point of intersection: (3, 5)
67. x2 y2 5 y2 5 x2 x y 1 y x 1
5 x2 x 12
5 x2 x2 2x 1
0 2x2 2x 4 2x 1x 2
x 1 or x 2
The corresponding y-values are y 2 for x 1 and y 1 for x 2.
64. 3x 2 y 4x 2y
4 y 10 y
3x 4 2
4x 10 2
3x 4 2
3x 4
4x 10 2
4x 10
7x 14
x 2
The corresponding y-value is y 1.
Point of intersection: 2, 1
Points of intersection: 1, 2, 2, 1
68. x2 y2 25 y2 25 x2 3x y 15 y 3x 15
25 x2 3x 152
25 x2 9x2 90x 225 0 10x2 90x 200 0 x2 9x 20
0 x 5x 4
x 4 or x 5
The corresponding y-values are y 3 for x 4 and y 0 for x 5.
Points of intersection: 4, 3, 5, 0
INSTRUCTOR USE ONLY ? 2010 Brooks/Cole, Cengage Learning ? Cengage Learning. All Rights Reserved.
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