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diagonisma mathimatikon
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130
3:
-
1. * x2 + y2 = ( > 0) .
2. * x2 + y2 + x + y = 0 , 0
.
3. * (1, - 1) (- 1, 1)
: (x - 1)2 + (y + 1)2 = 8.
4. * x2 + y2 + (x + y + 1) = 0
.
5. * (2
,
2
)
4 (x - )2 + 4 (y - )2 = 1 .
6. * x2 + y2 + 2x + 3y - 1 = 0
x2 + y2 + 2x + 3y + 2 = 0 .
7. * x2 + y2 = 4 2
y = x.
8. ** (x - 1)2 + (y + 2)2 = 1 (x - 2)2 + (y + 1)2 = 10
9. * (x + 1)2 + y2 = 18 y = x + 1. 10. ** (- 2, 2) (4, 2) (x - 1)2 + (y - 2)2 = 9
.
11. * x2 + (y - 1)2 = 3 x2 + (y - 1)2 = 3
10
.
12. * (x + y)2 - 4 = 2 xy .
13. * x = y = , [0, 2)
C: x2 + y2 = 2.
14. * x2 + y2 = 1
131
1 x + y = 1.
15. * x2 - 2x + 1 + y2 = 5
(1, 0).
16. * x2 + y2 = 2
.
17. * y = 22 x-
(- x ).
18. ** y = x.
(x - )2 + (y - ) 2 = 2.
19. * (x1, y1)
(x0, y0) . : (x1 - x0)2 + (y1 - y0)
2 < 2.
20. ** (1, 0) p = 2. 21. * y = 3
y2 = 16x.
22. * xy y2 = 2px
yy
.
23. * xx x2 = 8y. 24. x2 = 2py
1 (x1, y1) yy1 = p (x + x1).
25. ** .
.
26. * yy
x2 = 2y.
27. * (0, 0)
y = - 2
p, xx.
28. * y2 = 8x
x = - 2 (4, 0).
29. ** y2 = 2px p > 0, (0, 0),
.
132
30. * y2 = 3x x = - 4
3.
31. * x2 = 4y y = - 1. 32. ** (x - 1)2 + y2 = 1 y2 = - 2x
.
33. * x2 = y
y = x.
34. * (x0, y0) y2 = 2px
= 0y
p (y0 0).
35. * x2 + y2 = 1
y2 = 4x.
36. * y = x , x 0,
.
y
x0
37. * ,
.
38. * 0,
.
39. * 2
2
x +
2
2
y = 1 > .
40. **
. 2
1.
41. * ,
.
42. * 3
2 x2 +
5
1 y2 =
2
3 .
43. * (, ) ,
133
(- , - ).
44. * , . 45. * . 46. * (2, - 2)
C: 25
x 2 +
9
y 2 = 1.
47. * x2 + y2 = 1 > 0. 48. * x2 + 2y2 = 1 x2 + y2 = 1
.
49. ** 2
x 2 + y2 = 1
3
x 2 +
5
y 2 = 1.
50. * y = - 3 2
x 2 +
9
y 2 =
1.
51. * x = 2 2
x 2 +
3
y 2 = 1.
52. *
.
53. * 2
2
x +
2
2
y = 1
(, ) () x + () y = 1.
54. * 4x2 + y2 = 4 = 3
32.
55. ** 9
x 2 +
4
y 2 = 1
36
x 2 +
16
y 2 = 1 .
56. * 2
2
x -
2
2
y = 1.
> .
134
57. * C: 2
2
x -
2
2
y = 1 yy
.
58. * ,
.
59. * x2 - y2 = 2
= 2 .
60. * 2
2
y -
2
2
x = 1
1: y =
x 2: y = -
x.
61. * x2 - 9y = 0 . 62. *
.
63. ** (5, 4)
16x2 - 25y2 = 40.
64. *
.
65. *
.
66. * x2 + y2 = 0
, R.
67. * 5
x 2 -
4
y 2 = 1 yy
(0, 2) (0, - 2).
68. ** 3
x 2 -
5
y 2 = 1
x2 + y2 = 4.
135
69. * y = 2
1 x
4
x 2 - y2 = 1.
70. * xOy x2 - y2 = 4
.
71. ** 2
2
x -
2
2
y = 1
2
2
y -
2
2
x = 1.
72. * R, (, 1)
2
x 2 -
4
y 2 = 1.
73. ** 3
x 2 -
2
y 2 = 1 x2 -
4
y 2 = 1
.