) 2 - + 1 = 0 (-1, 2).
) (1, 2), (2, -2), (6, 1) :
1) ;
2) , , ;
3) , .
) (-10, 2) B (6, 4); (5, 2). .
, . , .
:
-
- + + z + D = 0, (9.1)
= (, , ) , ( );
-
, (9.2)
, (, 0, 0), (0, , 0), (0, 0, ) - ;
- , ( 0, 0, z 0) = (, , )
( - 0) + ( - 0) + (z - z 0) = 0, (9.3)
-
cos a + cos b + z cos g - p = 0, (9.4)
- , a, b, g - , ;
- , ( 1, 1, z 1), ( 2, 2, z 2),
( 3, 3, z 3)
(9.5)
(9.1) (9.4) :
m D <0.
d ( 0, 0, z 0) (9.1) :
d = (9.6)
1 + 1 + 1 z + D 1 = 0
2 + 2 + 2 z + D 2 = 0 :
(9.7)
:
1/ 2 = 1/ 2 = 1/ 2, (9.8)
:
1 2 + 1 2 + 1 2 = 0. (9.9)
.
) 2 + 4 - 5 z + 21 = 0 .
, D >0,
) , (1, 2, 3) (3, 2, 1).
(9.3) 3( - 1) + 2( - 2) + (z - 3) = 0
3 + 2 + z - 10 = 0.
) , (3, 2, -1) 3 - 5 + 2 z - 10 = 0.
, .. (3, -5, 2) . (9.3)
|
|
3( - 3) - 5( - 2) + 2(z + 1) = =0 3 - 5 + 2 z + 3 = 0.
) , (2, -1, 4) (3, 2, -1) + + 2 z - 3 = 0.
. , , . , + + 2 z - 3 = 0, .. = (1, 1, 2). , = ´ 1.
,
= = (11, -7, -2).
(9.3) 11( - 2) - 7( + 1) - 2(z - 4) = 0
11 - 7 - 2 z -21 = 0.
)
, (9.5):
..
: (9.7):
.