常 用 积 分 公 式
(一)含有ax?b的积分(a?0) 1.?dxax?b=
1alnax?b?C
2.?(ax?b)?dx=3.?4.?xax?bdx=
1a21a(??1)(ax?b)??1?C(???1)
(ax?b?blnax?b)?C
x2ax?bdxdx=
1?1?22(ax?b)?2b(ax?b)?blnax?b?C 3?a?2??1blnax?bxab25.?x(ax?b)dx=??C
6.?x(ax?b)x(ax?b)x222=?1bx1a2?lnax?bx?C
7.?dx=2(lnax?b?bax?b)?C
8.?(ax?b)dx=
1a3(ax?b?2blnax?b?b2ax?b)?C
9.?dxx(ax?b)2=
1b(ax?b)?1b2lnax?bx?C
(二)含有ax?b的积分 10.?ax?bdx=
23a215a2(ax?b)?C
(3ax?2b)(ax?b)?C
(15ax?12abx?8b)(ax?b)?C
22233311.?xax?bdx=12.?x13.?2ax?bdx=
2105a3xax?bdx=
23a2(ax?2b)ax?b?C
14.?x2ax?bdx=
215a3(3ax?4abx?8b)ax?b?C
22215.??1ax?b?bln?C?ax?b?bdx?b=?xax?b?2ax?barctan?C??b??b(b?0)
(b?0)16.?dxx2ax?b=?ax?bbx?a2b?xdxdxax?b
17.?ax?bxax?bx2dx=2ax?b?b?ax?bxa2
xax?bdxax?b18.?dx=???x (三)含有x2?a2的积分 19.?20.?dxx?a22=
1aarctanxa?C
dx(x?a)dxx?a2222n=
x2(n?1)a(x?a)x?ax?a222n?1?2n?32(n?1)a2?(xdx2?a)2n?1
21.?=
12aln?C
(四)含有ax?b(a?0)的积分
??dx?=?2ax?b??2?xax?b221ab1arctanabx?C?b?b(b?0)22.??ab1lnax?ax?
?C(b?0)23.?dx=
2alnax?b?C
2224.?xdxax2?bdx=
xba?a?ax2?b
225.?dxlnxx(ax2=
1?b)2bax2?b?C
26.?dxadxx2(ax2=?b)?1bx?b?ax2?b
27.dx2b?=
ax3(ax2?b)2b2lnax?x2?12bx2?C
28.?dx=
xdx(ax2?b)22b(ax2?b)?12b?ax2?b
(五)含有ax2?bx?c(a?0)的积分
?2ax?bCdx?4ac?b2arctan24ac?b2?29.?ax2?bx?c=???1b2?4ac??C?b2ln2ax?b??4ac2ax?b?b2?4ac30.?xax2?bx?cdx=
1lnax2?bx?c?b2a2a?dxax2?bx?c(六)含有x2?a2(a?0)的积分 31.?dx=x2222arsha?C1=ln(x?x?a)?C
x?a32.?dx=x(x2?a2)3a2x2?a2?C
33.?xx=x2?a2x2?a2d?C
34.?xdx=?1(x2?a2)3x2?C
?a2(b2?4ac)(b2?4ac)
35.?x222dx=x2x?a?22a2x?a2ln(x?22x?a)?C
36.?x2223dx=?xx?a22?ln(x?22x?a)?C
(x?a)dxxx?adxx22237.?=1alnx?a?axx?aax2222?C
2238.?x?a2222=?2?C
39.?40.?x?adx=
x2x?a?x8a222ln(x?x?a)?C
3822(x?a)dx=
22223(2x?5a)x?a?(x?a)?C
223222aln(x?4x?a)?C
2241.?xx?adx=42.?x22213x?adx=
x82(2x?a)x?a?2222a48ln(x?x?a)?C
2243.?x?axx?ax2222dx=x?a?aln2x?a?ax22?C
244.?dx=?x?ax22?ln(x?x?a)?C
22(七)含有45.?dxx?a2x?a22(a?0)的积分
2=xxarchxa?C1=lnx?xx?a22?C
46.?dx(x?a)223=?a2x?a222?C
47.?xx?a22dx=x?a?C
248.?x(x?a)x222223dx=?1x?a22?C
49.?dx=x2x?a?22a2x?a2lnx?x?a22?C
50.?x2223dx=?xx?a22?lnx?x?a22?C
(x?a)dxxx?adxx22251.?=
1aarccosax2?C
52.?x?a2222=
x?aax22?C
53.?54.?x?adx=x2x?a?x8222a222lnx?22x?a3822?C
22(x?a)dx=
22223(2x?5a)x?a?(x?a)?C
223alnx?4x?a?C
55.?xx?adx=56.?x22213x?adx=
x8(2x?a)x?a?2222a48lnx?x?a22?C
57.?x?axx?ax2222dx=x?a?aarccos22ax?C
258.?dx=?x?ax22?lnx?x?a22?C
(八)含有a?x59.?dxa?xdx(a?x)22322(a?0)的积分
xa?C
22=arcsin60.?=ax2a?x22?C