(8.1)
m <0,
+ b - = 0, (8.11)
: = cos a,
b = sin a, a - , - . (8.11) .
.
12 - 5 -65 = 0.
,
m = , = -65. (12/13) - (5/13) - 5 = 0, , = 5.
( 0, 0) (8.1) :
d = (8.12)
. (1, 2)
20 -21 -58 = 0.
(8.12)
d = .
1 + 1 + 1 = 0 2 + 2 + 2 = 0 , , :
.
. , 3 - 2 + 1= 0 2 + 5 -12 = 0 , .
. :
, (1,2)- .
. . : (8.1) = (, ), ( );
= (l, m) ( ), ( 0, 0).
.
) , (-2, -5), 3 + 5 + 2 = 0.
(8.8) ( +2)+ ( +5)=0. , = (3, 5) = (, ) . , = = (3, 5) ( ). , :
3( + 2) + 5( + 5) = 0 3 + 5 + 31 = 0.
) (2, 2), (-2, -8), (-6, -2). .
. : 0 = ((-2) + (-6))/2 = -4,
0 = ((-8) + (-2))/2 = -5. (8.10), , , : ( + 4)/6 = ( + 5)/7 7 - 6 - 2 = 0.
:
1 = 0, 1 = -3, ( + 6)/6 = ( + 2)/(-1), + 6 + 18 = 0,
2 = -2, 2 = 0, ( + 2)/0 = ( + 8)/8, + 2 = 0.
) (0, 1), (12, -1), (6, 5). , .
|
|
, , ( - 6) + ( - 5) = 0. (, ): , , , , -: (12 - 0, -1 - 1) = (12, -2). , : 12( - 6) - 2( - 5) = 0 12 - 2 -62 = 0.