3 (2 )
: . .
1.3.1. :
.
.
.
, - . .
. y = f(x) , .
, , t.
. .
.
+ + = 0,
, , .. 2 + 2 ¹ 0. .
, :
- C = 0, ¹ 0, ¹ 0
- = 0, ¹ 0, ¹ 0 { By + C = 0}-
- = 0, ¹ 0, ¹ 0 { Ax + C = 0}
- = = 0, ¹ 0
- = = 0, ¹ 0
.
. (, ) , + + = 0.
+ + = 0 :
, k.
. (a1, a2), a1 + a2 = 0
+ + = 0.
+ + = 0 ¹ 0, , , : ,
, , b .
. y = k1x + b1, y = k2x + b2, .
, k1 = k2.
, k1 = -1/k2.
. + + = 0 1 + 1 + 1 = 0 , 1 = l, 1 = l. 1 = l, .
.
. , 1(1, 1) = kx + b :
|
|
. (0, 0), + + =0 .
. .
, :
× + D = 0,
- ; - - .
: × + D1 = 0 × + D2 = 0, : (A1, B1, C1), (A2, B2, C2); (x, y, z).
:
:
.
m, n, p.
.