1. .
: ) ; ) ; ) ; ) .
: ) ; ) ; ) ; )
2. . , , , 8.
. + y - 4 = 0.
3. :
.
. .
4. : ,
. .
. .
5. , , , . .
. , , ..
6. : (0;2), B (7;3) (1;6). Ð =a.
.
7. x + y - 6=0, 3 x - 5 y +14=0 5 x -3 y -14=0. .
. x-y = 0, 5 x +3 y -26 = 0, 3 x +5 y 26 = 0.
8.. 3 x +4 y 20 = 0 8 x +6 y + 35 = 0.
. 14 x +14 y 45 = 0, 2 x - 2 y + 35 = 0.
9. : (0;0), (-1;-3) (-5;-1). , .
. 3 x y +14 = 0, x - 5 y -14 = 0, x +2 y = 0
10. (2;-1) , =8, b =6.
. 4,4.
11. A (3/2;1), B (1;5/3), (3;3), .
. 2,4.
12. : A 1(-1;-1), B 1(1;9), C 1(9;1). , .
. y = 0, x + 5 y 14 = 0, 5 x + y 14 = 0.
13. , , :
(2; ) B (3; ).
.
14. (1;2) (3;6) . .
. (0;5) (4;3).
15. , x +2 y +3 = 0, 2 x +3 y +4 = 0
5 x +8 y = 0.
. 5 +8 +11 = 0.
16. , + y +1=0, x + y +1 = 0 x y -10 = 0 . .
. 30.
17. A (3;9) : 6 = 0 3 - 4 y +9 = 0. .
. (1;3), (11;6).
18. , ,
4 x +3 y -12 = 0, .
. 3 - 4 -9 = 0, 3 - 4 +16 = 0, 4 x +3 y -37 = 0
4 +3 +13 = 0.
15. : ,
15.1. .
- , (). r - , (a; b)-
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(x - a)²+(y-b)²= r ². (15.1)
, ,
x ² + y ² = r ².
, x ² y ² x y.
15.1. 2 x ² + 2 y ² - 8 - 5 -4=0.
. 2 , . x ² -4 y ²+ , 4 ( ):
, = 2,
b = -5/4 r =11/4.
15.2. , , .
9 -2 41 = 0, 7 +4 + 7 = 0, -3 +1= 0.
. , :
1)
2)
3)
(3,-7), (5,2), (-1,0).
(x - )²+(y - b)²= r ². a, b, r , , , :
r ², :
4 + 18 b = -29 8 14 b =57. , =3,1, b = -2,3. r ² (-1 - ) 2+ b 2 = r ², .. r ²=22,1; ( -3,1)2 +( +2,3) 2 =22,1.
15.3. , (5,0) (1,4), + 3 = 0.
. :
, , .. (3,2). , , :
2 = k ( -3), k , + -5 = 0.
, k =1, -2 = 1( -3),
-1 = 0.
, .. + 3 = 0 -1 = 0. =2, =1, .. (2,1).
, .. . ,
( -2) 2+ ( -1) 2 = 10.
.
, F 1 F 2 , , , .
, 2, 2 .
. , F 1 F 2.
|
.
, b , a,d,c a 2 = b 2 + c 2 ().
|
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( ) , ( < , ε < 1).
, = b ( =0, ε = 0, ), ( 2 + 2 = 2).
, , .
D1: = , D2: = .
,
> (0< < 1).
. ri Fi di ε .
15.4. , .
. . . ,
.
2 = 10, b 2= 1 .
1. ?
2. , ?
3. ?