1.50. r: 1) (4; 7), r = 5; 2) (6; 3), r = 3) (3; 2), r = 3.
1.51. S (12; 5) . .
1.52. , 12 + 5 + 60 = 0, .
1.53. , (2; 7) (4; 3). .
1.54. , + = 5 + + 2 + 4 = 31. ..
1.55. + 6 + 14 6 = 0, 2 = 2.
1.56. , , : 1) 9 + 25 225 = 0; 2) 16 + 25 = 400.
1.57. , , , :
1) 4 5 100 = 0; 2) 9 4 144 = 0;
3) 16 9 y + 144 = 0; 4) 9 7 + 252 = 0.
1.58. , , + = 1.
1.59. , :
1) (0; 0) (1; 3) ;
2) (0; 0) (2; 4) .
1.60. , , 2 3 = 0. .
1.61. , , , =
+ 2 = 0 , 0,5.
1.62. , = , = 2 + 5 2.
1.63. + = 9. , 2 = 0.
1.64. , 2 + 2 + 4 + 12 +15 = 0 + = 0.
1.65. , , ( 2; 3). .
1.3.3.
: Ax + By + Cz + D = 0.
A (x0) + B (yy0) + C (zz0) = 0 , , (, , ) , .
:
,
(m, n, p) .
.
1.11. ,
(1; 2; 3) = (3; 4; 5).
|
|
.
, (. .1.4). .
. 1.4.
, =(3; 4; 5) (1; 2; 3) :
3( 1) 4(y+2) + 5(z 3) = 0 3 4y + 5z 26 = 0.
1.12. ,
0 (3; 2; 4), 5 +3 7z +1 = 0.
(. 1.5), , , . . . . , . , :
. =
. 1.5.
1.66. , , :
1) (2; 3; 1), = (5; 1; 4); 2) (1; 0; 1), = (1; 2; 3).
1.67. , , : 1) (2; 4; 3); 2) (1; 2; 4).
1.68. , (1; 2; 3): ) = (3; 4; 5); )
3 4 + 5z + 6 = 0; ) 1(0; 2; 5) ; ) z.
1.69. (5; 2; 1): ) 2 + 3z + 23 = 0; ) .
) .
, (5; 2; 1) . = (2; 1; 3):
.
:
= 5 + 2 t;
= 2 t;
z = 1 +3 t.
, , :
2(5 + 2t) (2 t) + 3(1 + 3t) + 23 = 0, t = 2, . . = 1; = 4; z = 7.
: (1; 4; 7).
) , :
, , ;
.
1.70. , 0 (2; 3; 1) = (3; 2; 1) = (1; 2; 3)
1.71. , 1(2; 15; 1) 2(1; 1; 1) , (5; 2; 3) (6; 1; 0).
1.
1. , 2 3 + 5=0 3+ 7 = 0, 5 + 4 + 8 = 0.
2. : 4x2 + 3y2 8x +12y 32 = 0, .
3. , (1;2; 0) (0; 3; 1) (2; 1;5)
4. , 2 x 3y + z + 3 = 0 , (2; 1, 1) (3; 1; 3).
2.
1. 8 + 4 3 = 0 = 0.
2. x2 + y2 + 14y 6 x 6 = 0, x 2y = 2.
3. , , (1; 1; 2) (0; 7; 4).
4. , (1; 3; 5), .
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3.
1. 2 + 5 1 = 0. (1; 3) , .
2. (1;1; 4) , (2; 1; 3). .
3. , , ,
52 + 92 30 + 18 + 9 = 0.
4.
.