, , = . , (, ) , = = , . ., :
(14.4)
.
( ,
. . l = 0, m ¹ 0, 1 = 0).
, ( 1, 1), ( 2 , 2):
(14.5)
14.2. , (1; 3) N (2; 5).
. . , , , . . , 2 -3 +11=0.
14.3. ,
. . , , (4.9), .
, ,
. - .
14.4. : .
. D .
,
. ,
,
, D , D , , .. . , D:
, ..
.
= t, t: -¥ < t < ¥. 1 = lt; 1 = mt
= = (14.6)
.
: .
, 1( 1, 1) k, : 1 = k( 1) (5.7)
1 kx1 = b, (5.7)
= kx + b (14.8)
14.5. , b= - 3 α = .
. : . , ; , .
.
. = k 1 + b 1 = k 2 x + b 2; = - .
(14.9)
, = 0,
(14.10)
, tg j , .. 1 + = 0,
(14.11)
14.6.
|
|
1) =2 x +5 =-3 +1:
2)
. 1) , , , . e .
.2) , . , .
. 14.7. : x+y -2 = 0; 9 x - 3 y -4=0 A (2; 2). .
. , : .
9 x 3 4 = 0 - 1 x+y -2=0 - 1. , , 1. 1 3, -1/3, . . k AC=-1/3. , , C: y -2=-1/3(x -2), x + 3 y 8 = 0. k , k AB=1 2 = x - 2, . . = . 1 1, : (2/3;2/3) (-1;3). :
, ..7 x + 5 y 8 = 0.
1. ?
2. ?
3. ?
4. , ?
5. ? ?