:
Ax + By + C = 0
:
) C = 0, (2)
Ax + By = 0,
, , , x = 0, y = 0 .
) (2) B = 0,
Ax + = 0, .
y, Oy.
) (2) A = 0,
By + = 0, ;
x, Ox.
: - , , , .
) C = 0 A = 0 (2) By = 0, y = 0.
Ox.
) C = 0 B = 0 (2) Ax = 0 x = 0.
Oy.
. . . .
l1 l2 l1: A1x + B1y + C1 = 0
l2: A2x + B2y + C2 = 0
S2 S1 S1 S2 .
l1 l2 .
1: cos l1 l2 = cos(l1 ; l2) =
2: , 2 :
l1 = l2 ó
3: 2 :
l1 l2 ó A1A2 + B1B2 = 0
13
. .
:
Ax + By + Cz + D = 0
:
1. D=0 Ax+By+Cz = 0
2. =0 Ax+By+D = 0 || OZ
3. =0 Ax+Cz+d = 0 || OY
4. A=0 By+Cz+D = 0 || OX
5. A=0 D=0 By+Cz = 0 OX
6. =0 D=0 Ax+Cz = 0 OY
7. C=0 D=0 Ax+By = 0 OZ
:
1. .
Cos (l1; l2) = cos(S1; S2) = =
2. .
Cos (l1; l2) = cos(N1; N2) = =
3. sin .
4. 2 || , ||
5. 2 || ||
6. .
14
( , .)
:
, :
|
|
1. = 0 + = 0 .
2. = 0 + = 0 =
3. = 0 + = 0 =
4. ==0 = 0 = 0
5. ==0 = 0 = 0
:
, ( =0), . :
= kx + b
k = tgα α
b
-:
++ = 0
= -- |:
=
= kx + b
:
16
x→∞
0:
y = f(x) x→0, > 0 > 0 , ≠x0, | 0| < , |f(x) - A| <
: = A
+∞:
y = f(x) x → + ∞, > 0 > 0, x > C |f(x) - A| <
: = A
-∞:
y = f(x) x→-∞, < 0 < 0 , < - |f(x) - A| <
: = A
:
y = f(x) x→x0, > 0 > 0 , . f(x) . ()