M1(x1,y1) Ax + By + C = 0.
M0(x0, y0). d
n
1
d d = n M0 M1 .
0
M0M1 = {x1 x0, y1 y0}, n = {A, B}. (M0M1∙ n) = A(x1 x0) + B(y1 y0).
, .. 0 ,
Ax0 By0 = C. ,
, , 1 .
1. 2x - 3y +5 = 0 0(1, -2). , 0 ) , b) .
a) A(x x0) + B(y y0) = 0. n = {A, B} = {2, -3},
2(x 1) -3(y + 2) = 0, 2x -3y 5 =0 , .
s = {m, n} = n = {2, -3}
- , .
. . (6,2), (30, -5), (12, 19). :
- ,
- ,
3. , ,
4. .
1. = {-18, 24} = s .
| BC| =
24x + 18y 630 = 0, 4x + 3y 105 = 0.
3. BC = n .
-18 (x 6) + 24(y -2) = 0, -18x + 24y + 60 = 0,
3x - 4y 10 = 0 .
4.
.
Ax2 + 2Bxy + Cy2 + 2Dx + 2Ey + F = 0 .
, , ≠ 0 .
.
(x a)2 + (y b)2 = R2 x2 + y2 2ax 2by + a2 + b2 R2 = 0.
:
- 2 2 ,
- .
.
.
, , , , 2 a.
F 1M + F2M = 2 a - . F2F1 = 2 c - . 2a > 2c, a > c.
, :
: x = 0, y = . x ≥ 0, y
ymax= b = 0. 0 a b 0.
.
, , , , 2a.
F2M F1M = . F2F1 = 2c, 2 a < 2 c, a < c.
- y = 0, x = .
x = 0 .
x ≥ 0, y ≥ 0. . |x| ≥ a.
ymin= 0 x = a, .
. − .
.
|
|
, , , .
MF = MD, KF = p,
y2 = 2px - . y2 = -2px x2 =2py x2 = -2py
, x ≥ 0, .