3.3.1. г
, . j . . (0, b), b . ³ (, ) (. 3.22).
. 3.22
,
, | (1) |
, j = 0,5p tgj . = (. 3.23).
. 3.23
, - (, ), , (1). (1) 1( 1, 1),
1 = kx 1 + b,
³ (1), , :
(2)
dz k (2) , 1( 1, 1). г (2) () (. 3.24).
. 3.24
1( 1, 1), 2 ( 2, 2), 2 ¹ 1. (2) , 1, 2:
(3)
ϳ (3) (2), , 1( 1, 1), 2 ( 2, 2):
(4)
, 1(4, 1), 2(2, 3).
(4) :
135 .
, , 0( 0, 0) ,
s .
, . 1(, 0), 2(0, b), ¹ 0, b ¹ 0,
(5)
.
(5).
1 = 0 1 = 3. 2 = 0 2 = 2. ,
= 3, = 2.
3.3.2.
,
. (1)
, : | (2) |
, k 1 = k 2, b 1 = b 2. |
,
.
г (1). | (3) |
, (, ),
q (. 3.25).
. 3.25
. 3.25 : j2 = j1 + q ( , ). ,
|
|
, (1). | (4) |
(1, 1), (5, 1), (2, 4) a , CD (. 3.25).
. 3.25
(3), , :
D . ,
4 = 4( 2).
. ,
(5, 2), m (4) :
.
3.3.3.
, , 0( 0, 0) . (, ) (. 3.27).
. 3.27
. .
(1)
(2) |
.
(1) , (2) . г (1) (2).
г (2) (y = kx + b) ¹ 0.
, , -
n.
.
1. - (2). (2), 2 + 2 > 0, .
. (1). . ³
, , = 0, = 0,
0 + 0 + = 0.
³ ,
( 0) + ( 0) = 0. (3)
,
(3) .
. 3.27, , (, ) , 0( 0, 0) . (1), . , . ¨
, . (2) . + + > 0,
+ + < 0. : + + = 0.
(2):
= 0, ;
= 0, ;
= 0, ;
= 0, = 0, ;
= 0, = 0, .
, .
3.3.4.
:
(1)
(, ) , (1), , .
q (. 3.28).
. 3.28
|
|
, :
. | (2) |
, :
. | (3) |
, q:
(4)
, .
2. (1) ,
(5)