常用积分公式

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28.
(ax
2
dx x 1 dx = 2 2 b) 2b( ax b) 2b ax 2 b
2
(五)含有 ax bx c ( a 0) 的积分
2 2 ax b arctan C ( b 2 4 ac) 2 2 4ac b dx 4ac b 29. 2 = ax bx c 1 2 ax b b 2 4 ac ln C ( b 2 4 ac) b 2 4ac 2ax b b 2 4ac
77.
c bx ax 2 dx = x c bx ax
2
78.
dx =
(十)含有
xa 或 ( x a )(b x ) 的积分 x b x b )C
79.

xa xa dx = ( x b ) (b a ) ln( x a xb xb
32.
(x a ) x x a x
2 2
2 3

a
2
x2 a2
33.
dx = x 2 a 2 C dx = 1 x2 a2 C
34.
( x 2 a 2 )3 x2
35.
x 2 a2 2 dx = x a ln( x x 2 a 2 ) C 2 2 2 2 x a
65.

1 a a2 x2 ln C a x a2 x2 C a2x
66.
a2 x2

67. 68.
a 2 x 2 dx =
x 2 a2 x a x 2 arcsin C 2 2 a
x 3 x ( a 2 x 2 ) 3 dx = (5a 2 2 x 2 ) a 2 x 2 a 4 arcsin C 8 8 a 1 2 2 (a 2 x 2 )3 C 69. x a x dx = 3
2
7.
(ax b) dx = a
2
(ln ax b
b )C ax b
8.
1 b2 x2 = ( ax b 2 b ln ax b )C d x (ax b) 2 a3 ax b
9.
x(ax b)
dx
2

1 1 ax b 2 ln C b(ax b) b x
10.
ax bdx =
13.

2 x dx = 2 ( ax 2b) ax b C 3a ax b
1
14.

2 x2 (3a 2 x 2 4abx 8b 2 ) ax b C dx = 3 15a ax b 1 ln b ax b b C ( b 0) ax b b
21.
dx 1 xa = ln C 2 a 2a x a
2
(四)含有 ax b(a 0) 的积分
1 a arctan x C ( b 0) b dx ab 22. 2 = ax b 1 a x b ln C ( b 0) 2 ab a x b x 1 dx = ln ax 2 b C 23. 2 ax b 2a
3
ln 2ax b 2 a ax 2 bx c C
75.

x ax bx c
2
dx =
1 ax 2 bx c a b 2 a
3
dx c bx ax 2
ln 2ax b 2 a ax 2 bx c C
76.


1 2 ax b arcsin C a b 2 4ac 2ax b b 2 4ac 2ax b c bx ax 2 arcsin C 4a 8 a3 b 2 4ac 1 b 2 ax b c bx ax 2 arcsin C 3 a 2 a b 2 4ac
x 2 a2 x a 2 ln( x x 2 a 2 ) C 2 2
x 3 ( x 2 a 2 ) 3 dx = (2 x 2 5a 2 ) x 2 a 2 a 4 ln( x x 2 a 2 ) C 8 8 1 2 2 ( x 2 a 2 )3 C 41. x x a dx = 3
2
72.
(九)含有 ax bx c ( a 0) 的积分 73.

dx ax bx c
2

1 ln 2ax b 2 a ax 2 bx c C a 2ax b ax 2 bx c 4a
6
74.
ax 2 bx c dx =

4ac b 2 8 a
(二)含有 ax b 的积分
2 ( ax b) 3 C 3a 2 (3ax 2b) ( ax b) 3 C 11. x ax b dx = 2 15a 2 2 (15a 2 x 2 12abx 8b 2 ) ( ax b) 3 C 12. x ax b dx = 105a 3
48.
( x 2 a 2 )3
4
49.
x x
x2 x2 a2 x2
2
dx =
x 2 a2 x a 2 ln x x 2 a 2 C 2 2 x x a
2 2
50.
(x a ) dx x2 a2 dx
2 3
dx =
ln x x 2 a 2 C
42. x

2
x a4 x 2 a 2 dx = (2 x 2 a 2 ) x 2 a 2 ln( x x 2 a 2 ) C 8 8
43.

x2 a2 a x2 a2 2 2 = x a a ln C dx x x x2 a2 x2 a2 = d x ln( x x 2 a 2 ) C 2 x x x 2 a 2 ( a 0) 的积分
x (a x ) x2 a2 x2 x2 (a 2 x 2 )3 dx a2 x2 dx
2 2 2 3
dx =
1 a x2
2
C
63.
dx = dx =
x 2 a2 x a x 2 arcsin C 2 2 a x a2 x2 arcsin x C a
64.
24.
x2 x b dx ax 2 bdx = a a ax 2 b
2
25.

1 x2 dx ln C = x (ax 2 b) 2b ax 2 b 1 a dx dx 2 = 2 bx b ax b (ax b)
26.
x
2
ax 2 b dx a 1 27. 3 = 2 ln C 2 2 x (ax b) 2b x 2bx 2
ax bdx = a
x
1
2
1 1 x2 ( ax b) 2 2b( ax b) b 2 ln ax b C ax bdx = a 3 2
5.
x(ax b) = b ln x
2
dx
1
ax b C x
6.
1 a ax b dx = 2 ln C bx b x (ax b) x 1
51.

1 a arccos C a x
52.
2
x2 a2 = C a2x x2 a2 x 2 a2 x a 2 ln x x 2 a 2 C 2 2
53. 54.
x 2 a 2 dx =
x 3 ( x 2 a 2 ) 3 dx = (2 x 2 5a 2 ) x 2 a 2 a 4 ln x x 2 a 2 C 8 8 1 2 2 ( x 2 a 2 )3 C 55. x x a dx = 3
dx 15. = x ax b
16.
2 ax b arctan C ( b 0) b b
x
2
dx ax b a dx = bx 2b x ax b ax b
17.
ax b dx dx = 2 ax b b x x ax b ax b ax b a dx dx = 2 x x 2 x ax b
常 用 积 分 公 式
(一)含有 ax b 的积分( a 0 ) 1.
ax b = a ln ax b C

dx
1
2. ( ax b) dx = 3. 4.
1 ( ax b) 1 C ( 1 ) a ( 1) ( ax b b ln ax b ) C
30.
ax
2
x 1 b dx dx = ln ax 2 bx c 2 bx c 2a 2a ax bx c x 2 a 2 ( a 0) 的积分
= arsh
(六)含有 31.
dx x a dx
2 2 2
x C1 = ln( x x 2 a 2 ) C a x C
80.
xa xa xa dx = ( x b ) (b a ) arcsin C bx bx bx dx xa = 2 arcsin C bx ( x a )(b x ) ( a b)
81.
82.
2x a b (b a ) 2 xa ( x a )(b x )dx = ( x a )(b x ) arcsin C 4 4 bx ( a b)
3
36.
x x
x2 (x a ) dx x2 a2 dx
2 2 2 3
dx =
x x a
2 2
ln( x x 2 a 2 ) C
37.

1 x2 a2 a ln C a x x2 a2 C a2x
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38.
x2 a2

39. 40.
x 2 a 2 dx =
56. x

2
x a4 x 2 a 2 dx = (2 x 2 a 2 ) x 2 a 2 ln x x 2 a 2 C 8 8
57.

a x2 a2 dx = x 2 a 2 a arccos C x x x2 a2 x2 a2 = d x ln x x 2 a 2 C 2 x x
70. x

2
x a4 x a 2 x 2 dx = (2 x 2 a 2 ) a 2 x 2 arcsin C 8 8 a
71.

a a2 x2 a2 x2 C dx = a 2 x 2 a ln x x a2 x2 a2 x2 x = d x arcsin C 2 x x a
2 2
58.
(八)含有 a x ( a 0) 的积分 59.

dx a2 x2 dx
= arcsin
x C a x C
60.
(a 2 x 2 )3 x a x
2 2

a2 a2 x2
61.
dx = a 2 x 2 C
5
62.
x x

44.
(七)含有 45.

dx x 2 a2 dx
2
x x arch C1 = ln x x 2 a 2 C x a

46.
x a
2
(x a ) x x a x
2 2
2 3
x2 a2
C
47.
dx = x 2 a 2 C dx = 1 x2 a2 C
2 2
18.
(三)含有 x a 的积分 19. 20.
x
2
dx 1 x = arctan C 2 a a a
2
(x x
2
dx x 2n 3 dx = 2 n 2 2 2 n 1 2 2 a ) 2( n 1)a ( x a ) 2( n 1)a ( x a 2 ) n 1
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