.
- A (x 1 ,y 1) B (x 2 ,y 2); | |
- (x,y), , A (x 1 ,y 1) B (x 2 ,y 2), ; | |
- ; | |
- (x 1 ,y 1), (x 2 ,y 2), (x3,y 3) ; | |
- (x 1 ,y 1), (x2,y 2), (x 3 ,y 3). |
Ax+By+C =0 | - ; |
A(x-x 0 )+B(y-y 0 )= 0 | - , (x 0 ,y 0) { A,B }; |
- , (x 0 ,y 0) { l,m }; | |
- , (x 0 ,y 0) ; | |
- , (x 1 ,y 1) (x 2 ,y 2); | |
- k, - ox; | |
- , (, 0) (0,b) - ox oy; | |
- , - , a- ox , ; | |
- ; ; | |
- (x 0 ,y 0) Ax+By+C=0; | |
- A 1 x+B 1 y+C 1=0 A 2 x+B 2 y+C 2=0; | |
- y=k 1 x+b 1 y=k 2 x+b 2; | |
- , A 1 x+B 1 y+ C1 =0, A 2 x+B 2 y+C 2 =0 y=k1x+b1, y=k2x+b2; | |
- , A 1 x + B 1 y + C 1=0, A 2 x + B 2 y + C 2=0 y=k 1 x+b 1, y=k2x+b 2; | |
- , A 1 x+B 1 y+C 1 =0, A 2 x+B 2 y+C 2 =0 y=k 1 x+b 1, y=k 2 x+b 2; | |
A 1 x+B 1 y+C 1+ + (A 2 x+B 2 y+C 2)=0 | - , A 1 x+B 1 y+C 1=0 A 2 x+B 2 y+C 2=0 - , . |
M 1(x 1, y 1), M 2(x 2, y 2)
.
M (x,y) M 1 M 2 , . : .
1 = 2, :
, l , 1 2, l .
|
|
xoy z = 0.
Ax+By+C =0.
= 0 ( = 0), ox ( oy). =0, . (x 0, y 0) , : .
(x 0, y 0) , z = 0
t , .