4.3.1.
() | = f (x) 0 , f 0 ( ) , |
f (x) 0, . |
³
. 4.9
. y = f (x) 0, - f (x) .
,
. y = f (x) 0,
1) f (x) 0;
2) 0 (. 4.10):
.
. 4.10
. = f (x) 0, .
. , y = x 2 y = sin x - 0 Î R.
1. 0 Î R D , .
D , D , D 0, D 0. , y = x 2 - 0 Î R.
2. 0 Î R D :
D 0, D 0. , y = sin x - 0 Î R.
. = f (x) (, b), .
. = f (x) [ , b ], (, b) = = b .
. = f (x) 0 (),
0 (. 4.11).
. 4.11
1. .
4.3.2.
2. = f (x) i y = g (x) (, b). :
1) f (x) g (x); 3) const g (x);
F(x) g(x); 4) f(x) / g(x), g(x) ¹ 0.
3. = f (x) - 0 u = F (y) f (x 0),
f F c u = F (f (x)) 0.
.
,
- .
f (x) F (x) 1, f F 3.
4.3.3.
. = f (x), 0, .
(. 4.12) |
. 4.12
(. 4.13). |
. 4.13
(. 4.14) |
. 4.14
|
|
. | 0 = f (x), : | ||
1. 2. 3. | 1- ; | ||
4. 1- | |||
. | 0 2- = f (x), . |
4.3.4.
= f (x)
1. 0 . , .
2. .
3.
.
4. ( ), .
. 4.15
1. 0 = 1 , ( ( ¥; 1) = , (1, +¥) : = + 1).
2. ( ¥; 1) (1; + ¥).
3.
.
4. ,
= 1 1- .
1. 0 = 0 , .
2. ( ¥; 0) (0; + ¥) , .
3.
1 = 1 =1 0 = 0 . , (. 4.8).
4.3.5.
1. 2. 3. .
4. . 5.
4.3.6.
, , ,
, , , .
. ,
. , ,