. f(x). f (x) [a,b],
() =
, , ¢(x) = f (x), () f (x). () .
. (x). D , + D [ a,b ], () (. 5.5, ).
D() = ( + D ) - () = =
. (5.13)
D(x) = = f ()D x, Î [ x, x +D x ].
. 5.5. .
, = f (). f (x) , D 0, x, () f (x)
. (5.13)
() f (x), , , () . , f (x) , f (x) .
. . f (x) [ a,b ],
. (5.14)
. [ a,b ] f (x) , ,
(x) = = F (x) + C. (5.15)
F () . , ,
() = = 0 (5.16)
(5.16) :
- F (a) = C. (5.17)
(b) = , (5.18)
, (5.17) (5.18)
(5.19)
F (x) - f (x), - . , F (x) .
(5.19) : , .. , .
1. .
. . , (5.19)
, .
|
|
= - (5.20)
2.
. . =1, , (5.20), u = x.
=
. , : .
= (5.21)
x = j(t), j(a) = a, a=j-1(a); j(b) = b, b = j-1(b).
3. .
. ln () = t, . = 1, t = ln 1 = 0, = , t = ln = 1.
, . , .
. f (x) £ <+¥.
. b b. b , f (x) . ,
. (5.22)
(5.22) , , .
,
.
: F (x) f (x), , ..
.
. , .
:
p 1, ,
p = 1, ,
: I :
> 1, , .. ,
< 1, , .. ,
= 1, .
. f (x) [ a,b ] Î [ a,b ]. .
1. b. f (x)
.
. .
.
2. .
.
. = 0,
|
|
.
, ( ).
[ a,b ], ..
a < c < b.
.
. .
. 0.
.