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常用的积分公式

常 用 积 分 公 式(一)含有ax b +的积分(0a ≠)1.d x ax b +⎰=1ln ax b C a ++2.()d ax b x μ+⎰=11()(1)ax b C a μμ++++(1μ≠-) 3.d x x ax b +⎰=21(ln )ax b b ax b C a +-++4.2d x x ax b +⎰=22311()2()ln 2ax b b ax b b ax b C a ⎡⎤+-++++⎢⎥⎣⎦ 5.d ()x x ax b +⎰=1ln ax b C b x +-+6.2d ()x x ax b +⎰=21ln a ax b C bx b x +-++7.2d ()x x ax b +⎰=21(ln )b ax b C a ax b ++++8.22d ()x x ax b +⎰=231(2ln )b ax b b ax b C a ax b +-+-++9.2d ()x x ax b +⎰=211ln ()ax b C b ax b b x +-++的积分10.x⎰=C 11.x ⎰=22(3215ax b C a -+12.x x ⎰=22232(15128105a x abx b C a -+ 13.x ⎰=22(23ax b C a - 14.2x ⎰=22232(34815a x abx b C a -+ 15.⎰(0)(0)C b C b ⎧+>+<16.⎰=2a bx b -- 17.x ⎰=b18.x ⎰=2a +(三)含有22x a ±的积分19.22d x x a +⎰=1arctan x C a a +20.22d ()n x x a +⎰=2221222123d 2(1)()2(1)()n n x n x n a x a n a x a ---+-+-+⎰21.22d x x a -⎰=1ln 2x a C a x a -++(四)含有2(0)ax b a +>的积分 22.2d x ax b +⎰=(0)(0)C b C b ⎧+>+<23.2d x x ax b +⎰=21ln 2ax b C a ++24.22d x x ax b +⎰=2d x b x a a ax b -+⎰25.2d ()x x ax b +⎰=221ln 2x C b ax b ++26.22d ()x x ax b +⎰=21d a x bx b ax b --+⎰27.32d ()x x ax b +⎰=22221ln 22ax b a C b x bx +-+28.22d ()x ax b +⎰=221d 2()2xxb ax b b ax b +++⎰(五)含有2ax bx c ++(0)a >的积分29.2d x ax bx c ++⎰=22(4)(4)Cb ac Cb ac +<+> 30.2d xx ax bx c ++⎰=221d ln 22b xax bx c a a ax bx c++-++⎰(0)a >的积分31.⎰=1arsh xC a +=ln(x C ++32.⎰C +33.x ⎰C34.x ⎰=C +35.2x ⎰2ln(2a x C ++36.= 37.⎰1ln a C a x -+38.⎰C +39.x ⎰2ln(2a x C ++ 40.x ⎰=2243(25ln(88x x a a x C ++++ 41.x ⎰C + 42.x x ⎰=422(2ln(88x a x a x C +++43.x ⎰ln a a C x + 44.2d x x ⎰=ln(x C x -+++(0)a >的积分45.=1arch x x C x a +=ln x C ++46.47.x⎰C48.x⎰=C+49.2x⎰2ln2ax C+++50.2x⎰=ln x C+++51.⎰1arccos a Ca x+52.⎰C+53.x2ln2ax C++54.x⎰=2243(25ln88xx a a x C-+++55.x⎰C56.x x⎰=422(2ln88x ax a x C-++57.x⎰arccosaa Cx+58.x⎰=ln x C+++(0)a>的积分59.⎰=arcsinxCa+60.⎰C+61.x⎰=C62.x⎰C+63.2x⎰=2arcsin2a xCa+64.2x⎰arcsinxCa-+65.⎰1lnaCa x-+66.⎰2Ca x-+67.x2arcsin2a xCa+68.x⎰=2243(52arcsin88x xa x a Ca-+69.x⎰=C70.x x⎰=422(2arcsin88x a xx a Ca-++71.d xx⎰a C+72.x⎰=arcsinxCa-+(0)a>的积分73.⎰2ax b C+++74.x⎰22ax b C++++75.x ⎰=2ax b C-+++76.⎰=C+77.x⎰2C+ 78.x⎰=C++79.x⎰=((x b b a C--+80.x⎰=((x b b a C-+-+81.⎰C()a b<82.x⎰2()4b aC-()a b<(十一)含有三角函数的积分83.sin d x x⎰=cos x C-+84.cos d x x ⎰=sin x C +85.tan d x x ⎰=ln cos x C -+86.cot d x x ⎰=ln sin x C +87.sec d x x ⎰=ln tan()42x C π++=ln sec tan x x C ++88.csc d x x ⎰=ln tan2x C +=ln csc cot x x C -+ 89.2sec d x x ⎰=tan x C + 90.2csc d x x ⎰=cot x C -+91.sec tan d x x x ⎰=sec x C +92.csc cot d x x x⎰=csc x C -+ 93.2sin d x x ⎰=1sin 224x x C -+ 94.2cos d x x ⎰=1sin 224x x C ++ 95.sin d n x x ⎰=1211sin cos sin d n n n x x x x n n ----+⎰96.cos d nx x ⎰=1211cos sin cos d n n n x x x x n n ---+⎰97.d sin n x x ⎰=121cos 2d 1sin 1sin n n x n x n x n x ----⋅+--⎰98.d cos n x x ⎰=121sin 2d 1cos 1cos n n x n x n x n x ---⋅+--⎰99.cos sin d m nx x x ⎰=11211cos sin cos sin d m n m n m x x x x x m n m n -+--+++⎰ =11211cos sin cos sin d m n m n n x x x x x m n m n +----+++⎰ 100.sin cos d ax bx x ⎰=11cos()cos()2()2()a b x a b x C a b a b -+--++- 101.sin sin d ax bx x ⎰=11sin()sin()2()2()a b x a b x C a b a b -++-++- 102.cos cos d ax bx x ⎰=11sin()sin()2()2()a b x a b x C a b a b ++-++-103.d sin x a b x +⎰tan x a b C ++22()a b >104.d sin x a b x +⎰C +22()a b < 105.d cos x a b x +⎰=)2x C +22()a b >106.d cos x a b x +⎰=C +22()a b <107.2222d cos sin x a x b x +⎰=1arctan(tan )b x C ab a +108.2222d cos sin x a x b x -⎰=1tan ln 2tan b x a C ab b x a ++-109.sin d x ax x ⎰=211sin cos ax x ax C a a -+110.2sin d x ax x ⎰=223122cos sin cos x ax x ax ax C a a a -+++ 111.cos d x ax x ⎰=211cos sin ax x ax C a a ++112.2cos d x ax x ⎰=223122sin cos sin x ax x ax ax C a a a +-+ (十二)含有反三角函数的积分(其中0a >)113.arcsin d x x a ⎰=arcsin x x C a +114.arcsin d x x x a ⎰=22()arcsin 24x a x C a -+115.2arcsin d x x x a ⎰=3221arcsin (239x x x a C a ++116.arccos d x x a ⎰=arccos x x C a -117.arccos d x x x a ⎰=22()arccos 24x a x C a -118.2arccos d x x x a ⎰=3221arccos (239x x x a C a -++ 119.arctan d x x a ⎰=22arctan ln()2x a x a x C a -++120.arctan d x x x a ⎰=221()arctan 22x a a x x C a +-+121.2arctan d x x x a ⎰=33222arctan ln()366x x a a x a x C a -+++ (十三)含有指数函数的积分122.d x a x⎰=1ln x a C a + 123.e d axx ⎰=1e ax C a + 124.e d axx x ⎰=21(1)e ax ax C a -+ 125.e d n axx x ⎰=11e e d n ax n ax n x x x a a --⎰126.d xxa x ⎰=21ln (ln )x x x a a C a a -+ 127.d n x x a x ⎰=11d ln ln n x n x n x a x a x a a --⎰128.e sin d axbx x ⎰=221e (sin cos )ax a bx b bx C a b -++ 129.e cos d axbx x ⎰=221e (sin cos )ax b bx a bx C a b +++ 130.e sin d ax nbx x ⎰=12221e sin (sin cos )ax n bx a bx nb bx a b n --+ 22222(1)e sin d ax n n n b bx x a b n --++⎰131.e cos d ax n bx x ⎰=12221e cos (cos sin )ax n bx a bx nb bx a b n -++ 22222(1)e cos d ax n n n b bx x a b n --++⎰(十四)含有对数函数的积分132.ln d x x ⎰=ln x x x C -+133.d ln x x x ⎰=ln ln x C +134.ln d nx x x ⎰=111(ln )11n x x C n n +-+++ 135.(ln )d nx x ⎰=1(ln )(ln )d n n x x n x x --⎰136.(ln )d m nx x x ⎰=111(ln )(ln )d 11m n m n n x x x x x m m +--++⎰ (十五)含有双曲函数的积分137.sh d x x ⎰=ch x C + 138.ch d x x ⎰=sh x C + 139.th d x x ⎰=lnch x C +140.2sh d x x ⎰=1sh224x x C -++ 141.2ch d x x ⎰=1sh224x x C ++ (十六)定积分142.cos d nx x π-π⎰=sin d nx x π-π⎰=0143.cos sin d mx nx x π-π⎰=0144.cos cos d mx nx x π-π⎰=0,,m nm n ≠⎧⎨π=⎩ 145.sin sin d mx nx x π-π⎰=0,,m nm n ≠⎧⎨π=⎩ 146.0sin sin d mx nx x π⎰=0cos cos d mx nx x π⎰=0,,2m n m n ≠⎧⎪⎨π=⎪⎩147. n I =20sin d nx x π⎰=20cos d n x x π⎰n I =21n n I n --1342253n n n I n n --=⋅⋅⋅⋅-L (n 为大于1的正奇数),1I =113312422n n n I n n --π=⋅⋅⋅⋅⋅-L (n 为正偶数),0I =2π。

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