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| The following is a list of [[integral]]s ([[antiderivative]] functions) of [[rational function]]s. | | Howdy. The author's name is Eusebio although he never really beloved that name. In his professional life he can be a people manager. He's always loved living located in Guam and he features everything that he circumstances there. To drive is one of those things he loves most. He's been working about his website for several time now. Check it out here: http://prometeu.net<br><br>My blog post; [http://prometeu.net clash of clans hack 2014] |
| For other types of functions, see [[lists of integrals]].
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| <!--CAUTION: before 'correcting' one of these integrals, please check that the amended integral doesn't simply differ from the existing version by a constant term. NOTE: a constant *factor* in the argument of ln() may amount to a constant term in the integral. -->
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| == Miscellaneous integrands ==
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| :<math>\int\frac{f'(x)}{f(x)} \, dx= \ln\left|f(x)\right| + C</math>
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| :<math>\int\frac{1}{x^2+a^2} \, dx = \frac{1}{a}\arctan\frac{x}{a}\,\! + C</math>
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| :<math>\int\frac{1}{x^2-a^2} \, dx = \begin{cases} \displaystyle -\frac{1}{a}\,\operatorname{arctanh}\frac{x}{a} = \frac{1}{2a}\ln\frac{a-x}{a+x} + C & \text{(for }|x| < |a|\mbox{)} \\[12pt] \displaystyle -\frac{1}{a}\,\operatorname{arccoth}\frac{x}{a} = \frac{1}{2a}\ln\frac{x-a}{x+a} + C & \text{(for }|x| > |a| \mbox{)} \end{cases}</math>
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| : <math>\int \frac{dx}{x^{2^n} + 1} = \sum_{k=1}^{2^{n-1}} \left \{ \frac{1}{2^{n-1}} \left [ \sin \left(\frac{(2k -1) \pi}{2^n}\right) \arctan\left[\left(x - \cos \left(\frac{(2k -1) \pi}{2^n} \right) \right ) \csc \left(\frac{(2k -1) \pi}{2^n} \right) \right] \right] - \frac{1}{2^n} \left [ \cos \left(\frac{(2k -1) \pi}{2^n} \right) \ln \left | x^2 - 2 x \cos \left(\frac{(2k -1) \pi}{2^n} \right) + 1 \right | \right ] \right \} + C </math>
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| <br />
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| Any rational function can be integrated using '''[[partial fractions in integration]]''', by decomposing the rational function into a sum of functions of the form:
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| : <math>\frac{a}{(x-b)^n}</math>, and <math>\frac{ax + b}{\left((x-c)^2+d^2\right)^n}.</math>
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| == Integrands of the form ''x''<sup>''m''</sup>(''a x'' + ''b'')<sup>''n''</sup> ==
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| :<math>\int\frac{1}{ax + b} \, dx= \frac{1}{a}\ln\left|ax + b\right| + C</math>
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| ::More generally,<ref>"[http://golem.ph.utexas.edu/category/2012/03/reader_survey_logx_c.html Reader Survey: log|''x''| + ''C'']", Tom Leinster, ''The ''n''-category Café'', March 19, 2012</ref>
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| ::<math>\int\frac{1}{ax + b} \, dx= \begin{cases}
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| \frac{1}{a}\ln\left|ax + b\right| + C^- & x < -b/a \\
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| \frac{1}{a}\ln\left|ax + b\right| + C^+ & x > -b/a
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| \end{cases}</math>
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| :<math>\int (ax + b)^n \, dx= \frac{(ax + b)^{n+1}}{a(n + 1)} + C \qquad\text{(for } n\neq -1\mbox{)}\,\!</math> ([[Cavalieri's quadrature formula]])
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| <br>
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| :<math>\int\frac{x}{ax + b} \, dx= \frac{x}{a} - \frac{b}{a^2}\ln\left|ax + b\right| + C</math>
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| :<math>\int\frac{x}{(ax + b)^2} \, dx= \frac{b}{a^2(ax + b)} + \frac{1}{a^2}\ln\left|ax + b\right| + C</math>
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| :<math>\int\frac{x}{(ax + b)^n} \, dx= \frac{a(1 - n)x - b}{a^2(n - 1)(n - 2)(ax + b)^{n-1}} + C \qquad\text{(for } n\not\in \{1, 2\}\mbox{)}</math>
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| :<math>\int x(ax + b)^n \, dx= \frac{a(n + 1)x - b}{a^2(n + 1)(n + 2)} (ax + b)^{n+1} + C \qquad\text{(for }n \not\in \{-1, -2\}\mbox{)}</math>
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| <br>
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| :<math>\int\frac{x^2}{ax + b} \, dx= \frac{b^2\ln(\left|ax + b\right|)}{a^3}+\frac{ax^2 - 2bx}{2a^2} + C</math>
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| :<math>\int\frac{x^2}{(ax + b)^2} \, dx= \frac{1}{a^3}\left(ax - 2b\ln\left|ax + b\right| - \frac{b^2}{ax + b}\right) + C</math>
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| :<math>\int\frac{x^2}{(ax + b)^3} \, dx= \frac{1}{a^3}\left(\ln\left|ax + b\right| + \frac{2b}{ax + b} - \frac{b^2}{2(ax + b)^2}\right) + C</math>
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| :<math>\int\frac{x^2}{(ax + b)^n} \, dx= \frac{1}{a^3}\left(-\frac{(ax + b)^{3-n}}{(n-3)} + \frac{2b (ax + b)^{2-n}}{(n-2)} - \frac{b^2 (ax + b)^{1-n}}{(n - 1)}\right) + C \qquad\text{(for } n\not\in \{1, 2, 3\}\mbox{)}</math>
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| <br>
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| :<math>\int\frac{1}{x(ax + b)} \, dx = -\frac{1}{b}\ln\left|\frac{ax+b}{x}\right| + C</math>
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| :<math>\int\frac{1}{x^2(ax+b)} \, dx = -\frac{1}{bx} + \frac{a}{b^2}\ln\left|\frac{ax+b}{x}\right| + C</math>
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| :<math>\int\frac{1}{x^2(ax+b)^2} \, dx = -a\left(\frac{1}{b^2(ax+b)} + \frac{1}{ab^2x} - \frac{2}{b^3}\ln\left|\frac{ax+b}{x}\right|\right) + C</math>
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| == Integrands of the form ''x''<sup>''m''</sup> / (''a x''<sup>2</sup> + ''b x'' + ''c'')<sup>''n''</sup> ==
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| For <math>a\neq 0:</math>
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| <br>
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| :<math>\int\frac{1}{ax^2+bx+c} dx =
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| \begin{cases}
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| \displaystyle \frac{2}{\sqrt{4ac-b^2}}\arctan\frac{2ax+b}{\sqrt{4ac-b^2}} + C & \text{(for }4ac-b^2>0\mbox{)} \\[12pt]
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| \displaystyle -\frac{2}{\sqrt{b^2-4ac}}\,\mathrm{arctanh}\frac{2ax+b}{\sqrt{b^2-4ac}} + C = \frac{1}{\sqrt{b^2-4ac}}\ln\left|\frac{2ax+b-\sqrt{b^2-4ac}}{2ax+b+\sqrt{b^2-4ac}}\right| + C & \text{(for }4ac-b^2<0\mbox{)} \\[12pt]
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| \displaystyle -\frac{2}{2ax+b} + C & \text{(for }4ac-b^2=0\mbox{)}
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| \end{cases}</math>
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| <br>
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| :<math>\int\frac{x}{ax^2+bx+c} \, dx = \frac{1}{2a}\ln\left|ax^2+bx+c\right|-\frac{b}{2a}\int\frac{dx}{ax^2+bx+c} + C</math>
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| <br>
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| :<math>\int\frac{mx+n}{ax^2+bx+c} \, dx = \begin{cases}
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| \displaystyle \frac{m}{2a}\ln\left|ax^2+bx+c\right|+\frac{2an-bm}{a\sqrt{4ac-b^2}}\arctan\frac{2ax+b}{\sqrt{4ac-b^2}} + C &\text{(for }4ac-b^2>0\mbox{)} \\[12pt] \displaystyle \frac{m}{2a}\ln\left|ax^2+bx+c\right|-\frac{2an-bm}{a\sqrt{b^2-4ac}}\,\mathrm{arctanh}\frac{2ax+b}{\sqrt{b^2-4ac}} + C &\text{(for }4ac-b^2<0\mbox{)} \\[12pt] \displaystyle \frac{m}{2a}\ln\left|ax^2+bx+c\right|-\frac{2an-bm}{a(2ax+b)} + C &\text{(for }4ac-b^2=0\mbox{)}\end{cases}</math>
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| <br>
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| : <math>\int\frac{1}{(ax^2+bx+c)^n} \, dx= \frac{2ax+b}{(n-1)(4ac-b^2)(ax^2+bx+c)^{n-1}}+\frac{(2n-3)2a}{(n-1)(4ac-b^2)}\int\frac{1}{(ax^2+bx+c)^{n-1}} \, dx + C</math>
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| <br>
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| : <math>\int\frac{x}{(ax^2+bx+c)^n} \, dx= -\frac{bx+2c}{(n-1)(4ac-b^2)(ax^2+bx+c)^{n-1}}-\frac{b(2n-3)}{(n-1)(4ac-b^2)}\int\frac{1}{(ax^2+bx+c)^{n-1}} \, dx + C</math>
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| <br>
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| : <math>\int\frac{1}{x(ax^2+bx+c)} \, dx= \frac{1}{2c}\ln\left|\frac{x^2}{ax^2+bx+c}\right|-\frac{b}{2c}\int\frac{1}{ax^2+bx+c} \, dx + C</math>
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| == Integrands of the form ''x''<sup>''m''</sup> (''a'' + ''b x''<sup>''n''</sup>)<sup>''p''</sup> ==
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| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'' and ''p'' toward 0.
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| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
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| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| \frac{x^{m+1} \left(a+b\,x^n\right)^p}{m+n\,p+1}\,+\,
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| \frac{a\,n\,p}{m+n\,p+1}\int x^m \left(a+b\,x^n\right)^{p-1}dx
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| </math>
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| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| -\frac{x^{m+1} \left(a+b\,x^n\right)^{p+1}}{a\,n (p+1)}\,+\,
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| \frac{m+n (p+1)+1}{a\,n (p+1)}\int x^m \left(a+b\,x^n\right)^{p+1}dx
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| </math>
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| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| \frac{x^{m+1} \left(a+b\,x^n\right)^p}{m+1}\,-\,
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| \frac{b\,n\,p}{m+1}\int x^{m+n} \left(a+b\,x^n\right)^{p-1}dx
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| </math>
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| | |
| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| \frac{x^{m-n+1} \left(a+b\,x^n\right)^{p+1}}{b\,n (p+1)}\,-\,
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| \frac{m-n+1}{b\,n (p+1)}\int x^{m-n} \left(a+b\,x^n\right)^{p+1}dx
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| </math>
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| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| \frac{x^{m-n+1} \left(a+b\,x^n\right)^{p+1}}{b (m+n\,p+1)}\,-\,
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| \frac{a (m-n+1)}{b (m+n\,p+1)}\int x^{m-n}\left(a+b\,x^n\right)^pdx
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| </math>
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| :<math>
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| \int x^m \left(a+b\,x^n\right)^p dx =
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| \frac{x^{m+1} \left(a+b\,x^n\right)^{p+1}}{a (m+1)}\,-\,
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| \frac{b (m+n (p+1)+1)}{a (m+1)}\int x^{m+n}\left(a+b\,x^n\right)^pdx
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| </math>
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| == Integrands of the form (''A'' + ''B x'') (''a'' + ''b x'')<sup>''m''</sup> (''c'' + ''d x'')<sup>''n''</sup> (''e'' + ''f x'')<sup>''p''</sup> ==
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| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'', ''n'' and ''p'' toward 0.
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| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
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| * Special cases of these reductions formulas can be used for integrands of the form <math>(a+b\,x)^m (c+d\,x)^n (e+f\,x)^p</math> by setting ''B'' to 0.
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| :<math>
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| \int (A+B\,x) (a+b\,x)^m (c+d\,x)^n (e+f\,x)^p dx=
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| -\frac{(A\,b-a\,B)(a+b\,x)^{m+1} (c+d\,x)^n(e+f\,x)^{p+1}}{b (m+1) (a\,f-b\,e)}\,+\,
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| \frac{1}{b (m+1) (a\,f-b\,e)}\,\cdot
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| </math><blockquote><math>
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| \int (b\,c(m+1) (A\,f-B\,e)+(A\,b-a\,B) (n\,d\,e+c\,f(p+1))+d(b(m+1) (A\,f-B\,e)+f(n+p+1) (A\,b-a\,B))x)(a+b\,x)^{m+1} (c+d\,x)^{n-1}(e+f\,x)^p dx
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| </math></blockquote>
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| :<math>
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| \int (A+B\,x) (a+b\,x)^m (c+d\,x)^n (e+f\,x)^p dx=
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| \frac{B(a+b\,x)^m (c+d\,x)^{n+1}(e+f\,x)^{p+1}}{d\,f(m+n+p+2)}\,+\,
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| \frac{1}{d\,f(m+n+p+2)}\,\cdot
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| </math><blockquote><math>
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| \int (A\,a\,d\,f(m+n+p+2)-B (b\,c\,e\,m+a(d\,e(n+1)+c\,f(p+1)))+(A\,b\,d\,f(m+n+p+2)+B (a\,d\,f\,m-b(d\,e(m+n+1)+c\,f(m+p+1)))) x)(a+b\,x)^{m-1} (c+d\,x)^n(e+f\,x)^p dx
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| </math></blockquote>
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| :<math>
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| \int (A+B\,x) (a+b\,x)^m (c+d\,x)^n (e+f\,x)^p dx=
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| \frac{(A\,b-a\,B)(a+b\,x)^{m+1} (c+d\,x)^{n+1}(e+f\,x)^{p+1}}{(m+1)(a\,d-b\,c)(a\,f-b\,e)}\,+\,
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| \frac{1}{(m+1)(a\,d-b\,c)(a\,f-b\,e)}\,\cdot
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| </math><blockquote><math>
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| \int ((m+1) (A (a\,d\,f-b(c\,f+d\,e))+B\,b\,c\,e)-(A\,b-a\,B) (d\,e(n+1)+c\,f(p+1))-d\,f(m+n+p+3) (A\,b-a\,B)x)(a+b\,x)^{m+1} (c+d\,x)^n(e+f\,x)^p dx
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| </math></blockquote>
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| == Integrands of the form ''x''<sup>''m''</sup> (''A'' + ''B x''<sup>''n''</sup>) (''a'' + ''b x''<sup>''n''</sup>)<sup>''p''</sup> (''c'' + ''d x''<sup>''n''</sup>)<sup>''q''</sup> ==
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| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'', ''p'' and ''q'' toward 0.
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| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
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| * Special cases of these reductions formulas can be used for integrands of the form <math>\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^q</math> and <math>x^m\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^q</math> by setting ''m'' and/or ''B'' to 0.
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| :<math> | |
| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| -\frac{(A\,b-a\,B) x^{m+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^q}{a\,b\,n (p+1)}\,+\,
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| \frac{1}{a\,b\,n (p+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^m\left(c (A\,b\,n (p+1)+(A\,b-a\,B) (m+1))+d (A\,b\,n (p+1)+(A\,b-a\,B) (m+n\,q+1)) x^n\right)\left(a+b\,x^n\right)^{p+1}\left(c+d\,x^n\right)^{q-1}dx
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| </math></blockquote>
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| :<math>
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| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| \frac{B\,x^{m+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^q}{b (m+n (p+q+1)+1)}\,+\,
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| \frac{1}{b (m+n (p+q+1)+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^m\left(c ((A\,b-a\,B) (1+m)+A\,b\,n (1+p+q))+(d(A\,b-a\,B) (1+m)+B\,n\,q(b\,c-a\,d)+A\,b\,d\,n (1+p+q))\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^{q-1}dx
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| </math></blockquote>
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| :<math>
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| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| -\frac{(A\,b-a\,B) x^{m+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^{q+1}}{a\,n (b\,c-a\,d) (p+1)}\,+\,
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| \frac{1}{a\,n(b\,c-a\,d)(p+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^m\left(c(A\,b-a\,B)(m+1)+A\,n (b\,c-a\,d)(p+1)+d(A\,b-a\,B) (m+n (p+q+2)+1) x^n\right)\left(a+b\,x^n\right)^{p+1}\left(c+d\,x^n\right)^qdx
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| </math></blockquote>
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| :<math> | |
| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| \frac{B\,x^{m-n+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^{q+1}}{b\,d (m+n (p+q+1)+1)}\,-\,
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| \frac{1}{b\,d (m+n (p+q+1)+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^{m-n}\left(a\,B\,c (m-n+1)+(a\,B\,d (m+n\,q+1)-b (-B\,c (m+n\,p+1)+A\,d (m+n (p+q+1)+1))) x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx
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| </math></blockquote>
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| | |
| :<math>
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| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| \frac{A\,x^{m+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^{q+1}}{a\,c (m+1)}\,+\,
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| \frac{1}{a\,c (m+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^{m+n}\left(a\,B\,c (m+1)-A (b\,c+a\,d) (m+n+1)-A\,n (b\,c\,p+a\,d\,q)-A\,b\,d (m+n (p+q+2)+1) x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx
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| </math></blockquote>
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| | |
| :<math>
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| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| \frac{A\,x^{m+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^q}{a (m+1)}\,-\,
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| \frac{1}{a (m+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^{m+n}\left(c(A\,b-a\,B)(m+1)+A\,n (b\,c (p+1)+a\,d\,q)+d ((A\,b-a\,B) (m+1)+A\,b\,n (p+q+1)) x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^{q-1}dx
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| </math></blockquote>
| |
| | |
| :<math>
| |
| \int x^m\left(A+B\,x^n\right)\left(a+b\,x^n\right)^p\left(c+d\,x^n\right)^qdx=
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| \frac{(A\,b-a\,B) x^{m-n+1} \left(a+b\,x^n\right)^{p+1} \left(c+d\,x^n\right)^{q+1}}{b\,n (b\,c-a\,d) (p+1)}\,-\,
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| \frac{1}{b\,n(b\,c-a\,d)(p+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^{m-n}\left(c(A\,b-a\,B)(m-n+1)+(d(A\,b-a\,B)(m+n\,q+1)-b\,n(B\,c-A\,d)(p+1)) x^n\right)\left(a+b\,x^n\right)^{p+1}\left(c+d\,x^n\right)^qdx
| |
| </math></blockquote>
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| | |
| == Integrands of the form (''d'' + ''e x'')<sup>''m''</sup> (''a'' + ''b x'' + ''c x''<sup>2</sup>)<sup>''p''</sup> when ''b''<sup>2</sup> − 4 ''a c'' = 0 ==
| |
| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'' and ''p'' toward 0.
| |
| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
| |
| * Special cases of these reductions formulas can be used for integrands of the form <math>\left(a+b\,x+c\,x^2\right)^p</math> when <math>b^2-4\,a\,c=0</math> by setting ''m'' to 0.
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^p}{e(m+1)}\,-\,
| |
| \frac{p (d+e\,x)^{m+2}(b+2 c\,x) \left(a+b\,x+c\,x^2\right)^{p-1}}{e^2(m+1)(m+2 p+1)}\,+\,
| |
| \frac{p(2 p-1)(2 c\,d-b\,e)}{e^2(m+1)(m+2 p+1)} \int (d+e\,x)^{m+1}\left(a+b\,x+c\,x^2\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^p}{e(m+1)}\,-\,
| |
| \frac{p (d+e\,x)^{m+2}(b+2\,c\,x)\left(a+b\,x+c\,x^2\right)^{p-1}}{e^2(m+1)(m+2)}\,+\,
| |
| \frac{2\,c\,p\,(2\,p-1)}{e^2(m+1)(m+2)} \int (d+e\,x)^{m+2} \left(a+b\,x+c\,x^2\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m\left(a+b\,x+c\,x^2\right)^pdx=
| |
| -\frac{e(m+2 p+2)(d+e\,x)^m \left(a+b\,x+c\,x^2\right)^{p+1}}{(p+1)(2p+1)(2 c\,d-b\,e)}\,+\,
| |
| \frac{(d+e\,x)^{m+1}(b+2 c\,x) \left(a+b\,x+c\,x^2\right)^p}{(2p+1)(2 c\,d-b\,e)}\,+\,
| |
| \frac{e^2m(m+2 p+2)}{(p+1)(2p+1)(2 c\,d-b\,e)} \int (d+e\,x)^{m-1} \left(a+b\,x+c\,x^2\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| -\frac{e\,m(d+e\,x)^{m-1} \left(a+b\,x+c\,x^2\right)^{p+1}}{2c (p+1) (2p+1)}\,+\,
| |
| \frac{(d+e\,x)^m(b+2 c\,x)\left(a+b\,x+c\,x^2\right)^p}{2c (2p+1)}\,+\,
| |
| \frac{e^2m(m-1)}{2c (p+1) (2p+1)} \int (d+e\,x)^{m-2} \left(a+b\,x+c\,x^2\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^p}{e(m+2p+1)}\,-\,
| |
| \frac{p(2 c\,d-b\,e)(d+e\,x)^{m+1}(b+2 c\,x)\left(a+b\,x+c\,x^2\right)^{p-1}}{2c\,e^2(m+2 p)(m+2p+1)}\,+\,
| |
| \frac{p (2 p-1)(2 c\,d-b\,e)^2}{2c\,e^2(m+2 p)(m+2p+1)} \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| -\frac{2c\,e(m+2p+2)(d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^{p+1}}{(p+1) (2 p+1)(2 c\,d-b\,e)^2}\,+\,
| |
| \frac{(d+e\,x)^{m+1}(b+2 c\,x)\left(a+b\,x+c\,x^2\right)^p}{(2 p+1)(2 c\,d-b\,e)}\,+\,
| |
| \frac{2c\,e^2(m+2p+2)(m+2 p+3)}{(p+1) (2 p+1)(2 c\,d-b\,e)^2} \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^m (b+2 c\,x)\left(a+b\,x+c\,x^2\right)^p}{2c (m+2p+1)}\,+\,
| |
| \frac{m(2 c\,d-b\,e)}{2c (m+2p+1)} \int (d+e\,x)^{m-1}\left(a+b\,x+c\,x^2\right)^pdx
| |
| </math>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m\left(a+b\,x+c\,x^2\right)^pdx=
| |
| -\frac{(d+e\,x)^{m+1} (b+2 c\,x)\left(a+b\,x+c\,x^2\right)^p}{(m+1)(2 c\,d-b\,e)}\,+\,
| |
| \frac{2c (m+2p+2)}{(m+1)(2 c\,d-b\,e)} \int (d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^pdx
| |
| </math>
| |
| | |
| == Integrands of the form (''d'' + ''e x'')<sup>''m''</sup> (''A'' + ''B x'') (''a'' + ''b x'' + ''c x''<sup>2</sup>)<sup>''p''</sup> ==
| |
| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'' and ''p'' toward 0.
| |
| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
| |
| * Special cases of these reductions formulas can be used for integrands of the form <math>\left(a+b\,x+c\,x^2\right)^p</math> and <math>(d+e\,x)^m \left(a+b\,x+c\,x^2\right)^p</math> by setting ''m'' and/or ''B'' to 0.
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} (A\,e (m+2 p+2)-B\,d (2 p+1)+e\,B (m+1) x) \left(a+b\,x+c\,x^2\right)^p}{e^2(m+1) (m+2 p+2)}\,+\,
| |
| \frac{1}{e^2(m+1) (m+2 p+2)}p\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^{m+1} (B (b\,d+2 a\,e+2 a\,e\,m+2 b\,d\,p)-A\,b\,e (m+2 p+2)+(B (2 c\,d+b\,e+b\,e m+4 c\,d\,p)-2 A\,c\,e (m+2 p+2))x)\left(a+b\,x+c\,x^2\right)^{p-1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^m (A\,b-2 a\,B-(b\,B-2 A\,c) x)\left(a+b\,x+c\,x^2\right)^{p+1}}{(p+1)\left(b^2-4 a\,c\right) }\,+\,
| |
| \frac{1}{(p+1)\left(b^2-4 a\,c\right) }\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^{m-1}(B (2 a\,e\,m+b\,d (2 p+3))-A (b\,e\,m+2 c\,d (2 p+3))+e(b\,B-2 A\,c) (m+2 p+3) x)\left(a+b\,x+c\,x^2\right)^{p+1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} (A\,c\,e (m+2 p+2)-B (c\,d+2 c\,d\,p-b\,e\,p)+B\,c\,e(m+2 p+1) x)\left(a+b\,x+c\,x^2\right)^p}{c\,e^2(m+2 p+1) (m+2 p+2)}\,-\,
| |
| \frac{p}{c\,e^2(m+2 p+1) (m+2 p+2)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^m (A\,c\,e (b\,d-2 a\,e) (m+2 p+2)+B (a\,e (b\,e-2 c\,d\,m+b\,e\,m)+b\,d (b\,e\,p-c\,d-2 c\,d\,p))+
| |
| </math><blockquote><math>
| |
| \left(A\,c\,e (2 c\,d-b\,e) (m+2 p+2)-B \left(-b^2 e^2 (m+p+1)+2 c^2 d^2 (1+2 p)+c\,e (b\,d (m-2 p)+2 a\,e (m+2 p+1))\right)\right) x)\left(a+b\,x+c\,x^2\right)^{p-1}dx
| |
| </math></blockquote></blockquote>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{(d+e\,x)^{m+1} \left(A \left(b\,c\,d-b^2 e+2 a\,c\,e\right)-a\,B (2 c\,d-b\,e)+c (A (2 c\,d-b\,e)-B (b\,d-2 a\,e)) x\right)\left(a+b\,x+c\,x^2\right)^{p+1}}{(p+1)\left(b^2-4 a\,c\right) \left(c\,d^2-b\,d\,e+a\,e^2\right)}\,+\,
| |
| </math><blockquote><math>
| |
| \frac{1}{(p+1)\left(b^2-4 a\,c\right) \left(c\,d^2-b\,d\,e+a\,e^2\right)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^m (A \left(b\,c\,d\,e (2 p-m+2)+b^2 e^2 (m+p+2)-2 c^2 d^2 (3+2 p)-2 a\,c\,e^2 (m+2 p+3)\right)-
| |
| </math><blockquote><math>
| |
| B (a\,e (b\,e-2 c\,d m+b\,e\,m)+b\,d (-3 c\,d+b\,e-2 c\,d\,p+b\,e\,p))+c\,e(B (b\,d-2 a\,e)-A (2 c\,d-b\,e)) (m+2 p+4) x)\left(a+b\,x+c\,x^2\right)^{p+1}dx
| |
| </math></blockquote></blockquote></blockquote>
| |
| | |
| :<math>
| |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| \frac{B(d+e\,x)^m\left(a+b\,x+c\,x^2\right)^{p+1}}{c(m+2 p+2)}\,+\,
| |
| \frac{1}{c(m+2 p+2)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^{m-1} (m(A\,c\,d-a\,B\,e)-d(b\,B-2 A\,c)(p+1) +((B\,c\,d-b\,B\,e+A\,c\,e) m-e(b\,B-2 A\,c)(p+1))x) \left(a+b\,x+c\,x^2\right)^pdx
| |
| </math></blockquote>
| |
| | |
| :<math> | |
| \int (d+e\,x)^m (A+B\,x) \left(a+b\,x+c\,x^2\right)^pdx=
| |
| -\frac{(B\,d-A\,e) (d+e\,x)^{m+1} \left(a+b\,x+c\,x^2\right)^{p+1}}{(m+1)\left(c\,d^2-b\,d\,e+a\,e^2\right)}\,+\,
| |
| \frac{1}{(m+1)\left(c\,d^2-b\,d\,e+a\,e^2\right)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int (d+e\,x)^{m+1} ((A\,c\,d-A\,b\,e+a\,B\,e) (m+1)+b (B\,d-A\,e) (p+1)+c (B\,d-A\,e) (m+2 p+3) x)\left(a+b\,x+c\,x^2\right)^pdx
| |
| </math></blockquote>
| |
| | |
| == Integrands of the form ''x''<sup>''m''</sup> (''a'' + ''b x''<sup>''n''</sup> + ''c x''<sup>2''n''</sup>)<sup>''p''</sup> when ''b''<sup>2</sup> − 4 ''a c'' = 0 ==
| |
| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'' and ''p'' toward 0.
| |
| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
| |
| * Special cases of these reductions formulas can be used for integrands of the form <math>\left(a+b\,x^n+c\,x^{2 n}\right)^p</math> when <math>b^2-4\,a\,c=0</math> by setting ''m'' to 0.
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{ x^{m+1}\left(a+b\,x^n+c\,x^{2 n}\right)^p}{m+2 n\,p+1}\,+\,
| |
| \frac{n\,p\,x^{m+1} \left(2 a+b\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}}{(m+1)(m+2 n\,p+1)}\,-\,
| |
| \frac{b\,n^2 p (2 p-1)}{(m+1)(m+2 n\,p+1)} \int x^{m+n} \left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{(m+n(2 p-1)+1) x^{m+1}\left(a+b\,x^n+c\,x^{2 n}\right)^p}{(m+1)(m+n+1)}\,+\,
| |
| \frac{n\,p\,x^{m+1} \left(2 a+b\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}}{(m+1)(m+n+1)}\,+\,
| |
| \frac{2 c\,p\,n^2(2 p-1)}{(m+1)(m+n+1)} \int x^{m+2n} \left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{(m+n(2 p+1)+1) x^{m-n+1}\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{b\,n^2 (p+1) (2p+1)}\,-\,
| |
| \frac{x^{m+1} \left(b+2 c\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{b\,n (2p+1)}\,-\,
| |
| \frac{(m-n+1)(m+n(2 p+1)+1)}{b\,n^2 (p+1) (2p+1)} \int x^{m-n} \left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| -\frac{(m-3 n-2 n\,p+1) x^{m-2n+1}\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{2 c\,n^2(p+1)(2p+1)}\,-\,
| |
| \frac{ x^{m-2n+1} \left(2 a+b\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{2 c\,n(2p+1)}\,+\,
| |
| \frac{(m-n+1)(m-2n+1)}{2 c\,n^2(p+1)(2p+1)} \int x^{m-2n} \left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{x^{m+1}\left(a+b\,x^n+c\,x^{2 n}\right)^p}{m+2 n\,p+1}\,+\,
| |
| \frac{n\,p\,x^{m+1} \left(2 a+b\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}}{(m+2 n\,p+1) (m+n(2 p-1)+1)}\,+\,
| |
| \frac{2 a\,n^2 p (2 p-1)}{(m+2 n\,p+1) (m+n(2 p-1)+1)} \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| -\frac{(m+n+2 n\,p+1) x^{m+1}\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{2 a\,n^2 (p+1) (2p+1)}\,-\,
| |
| \frac{x^{m+1} \left(2 a+b\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{2 a\,n(2p+1)}\,+\,
| |
| \frac{(m+n(2 p+1)+1)(m+2 n (p+1)+1)}{2 a\,n^2 (p+1) (2p+1)} \int x^m \left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m\left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{x^{m-n+1} \left(b+2c\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{2c (m+2n\,p+1)}\,-\,
| |
| \frac{b (m-n+1)}{2c (m+2n\,p+1)} \int x^{m-n} \left(a+b\,x^n+c\,x^{2 n}\right)^p dx
| |
| </math>
| |
| | |
| :<math>
| |
| \int x^m\left(a+b\,x^n+c\,x^{2 n}\right)^p dx=
| |
| \frac{x^{m+1} \left(b+2c\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{b (m+1)}\,-\,
| |
| \frac{2c (m+n(2 p+1)+1)}{b (m+1)} \int x^{m+n} \left(a+b\,x^n+c\,x^{2 n}\right)^p dx
| |
| </math>
| |
| | |
| == Integrands of the form ''x''<sup>''m''</sup> (''A'' + ''B x''<sup>''n''</sup>) (''a'' + ''b x''<sup>''n''</sup> + ''c x''<sup>2''n''</sup>)<sup>''p''</sup> ==
| |
| * The resulting integrands are of the same form as the original integrand, so these reduction formulas can be repeatedly applied to drive the exponents ''m'' and ''p'' toward 0.
| |
| * These reduction formulas can be used for integrands having integer and/or fractional exponents.
| |
| * Special cases of these reductions formulas can be used for integrands of the form <math>\left(a+b\,x^n+c\,x^{2 n}\right)^p</math> and <math>x^m \left(a+b\,x^n+c\,x^{2 n}\right)^p</math> by setting ''m'' and/or ''B'' to 0.
| |
| | |
| :<math>
| |
| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
| |
| \frac{x^{m+1} \left(A (m+n (2 p+1)+1)+B (m+1) x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^p}{(m+1) (m+n (2 p+1)+1)}\,+\,
| |
| \frac{n\,p}{(m+1) (m+n (2 p+1)+1)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int x^{m+n} \left(2 a\,B (m+1)-A\,b (m+n (2 p+1)+1)+(b\,B (m+1)-2\,A\,c (m+n (2 p+1)+1)) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
| |
| \frac{x^{m-n+1} \left(A\,b-2 a\,B-(b\,B-2 A\,c) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{n(p+1) \left(b^2-4 a\,c\right)}\,+\,
| |
| \frac{1}{n(p+1) \left(b^2-4 a\,c\right)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int x^{m-n}\left((m-n+1)(2 a\,B-A\,b)+(m+2n (p+1)+1) (b\,B-2 A\,c) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
| |
| \frac{x^{m+1} \left(b\,B\,n\,p+A\,c (m+n (2 p+1)+1)+B\,c (m+2 n\,p+1) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^p}{c (m+2 n\,p+1) (m+n (2 p+1)+1)}\,+\,
| |
| \frac{n\,p}{c (m+2 n\,p+1) (m+n (2 p+1)+1)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int x^m \left(2 a\,A\,c (m+n (2 p+1)+1)-a\,b\,B (m+1)+\left(2 a\,B\,c (m+2 n\,p+1)+A\,b\,c (m+n (2 p+1)+1)-b^2 B (m+n\,p+1)\right) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p-1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
| |
| -\frac{x^{m+1} \left(A\,b^2-a\,b\,B-2 a\,A\,c+(A\,b-2 a\,B) c\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{a\,n(p+1) \left(b^2-4 a\,c\right)}\,+\,
| |
| \frac{1}{a\,n(p+1) \left(b^2-4 a\,c\right)}\,\cdot
| |
| </math><blockquote><math>
| |
| \int x^m \left((m+n (p+1)+1) A\,b^2-a\,b\,B(m+1)-2(m+2n (p+1)+1)a\,A\,c+(m+n (2p+3)+1)(A\,b-2 a\,B) c\,x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}dx
| |
| </math></blockquote>
| |
| | |
| :<math>
| |
| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
| |
| \frac{B\,x^{m-n+1}\left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{c (m+n (2 p+1)+1)}\,-\,
| |
| \frac{1}{c (m+n (2 p+1)+1)}\,\cdot
| |
| </math><blockquote><math>
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| \int x^{m-n} \left(a\,B (m-n+1)+(b\,B (m+n\,p+1)-A\,c (m+n (2 p+1)+1)) x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx
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| </math></blockquote>
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| | |
| :<math>
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| \int x^m \left(A+B\,x^n\right) \left(a+b\,x^n+c\,x^{2 n}\right)^pdx=
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| \frac{A\,x^{m+1} \left(a+b\,x^n+c\,x^{2 n}\right)^{p+1}}{a(m+1)}\,+\,
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| \frac{1}{a(m+1)}\,\cdot
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| </math><blockquote><math>
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| \int x^{m+n} \left(a\,B (m+1)-A\,b (m+n (p+1)+1)-A\,c (m+2 n(p+1)+1) x^n\right)\left(a+b\,x^n+c\,x^{2 n}\right)^pdx
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| </math></blockquote>
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| | |
| == References ==
| |
| {{reflist}}
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| | |
| {{Lists of integrals}}
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| | |
| [[Category:Integrals|Rational functions]]
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| [[Category:Mathematics-related lists|Integrals of rational functions]]
| |