Optimal. Leaf size=89 \[ -\frac{e^a x^{m+1} \left (-b x^n\right )^{-\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},-b x^n\right )}{2 n}-\frac{e^{-a} x^{m+1} \left (b x^n\right )^{-\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},b x^n\right )}{2 n} \]
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Rubi [A] time = 0.0695113, antiderivative size = 89, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.167, Rules used = {5361, 2218} \[ -\frac{e^a x^{m+1} \left (-b x^n\right )^{-\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},-b x^n\right )}{2 n}-\frac{e^{-a} x^{m+1} \left (b x^n\right )^{-\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},b x^n\right )}{2 n} \]
Antiderivative was successfully verified.
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Rule 5361
Rule 2218
Rubi steps
\begin{align*} \int x^m \cosh \left (a+b x^n\right ) \, dx &=\frac{1}{2} \int e^{-a-b x^n} x^m \, dx+\frac{1}{2} \int e^{a+b x^n} x^m \, dx\\ &=-\frac{e^a x^{1+m} \left (-b x^n\right )^{-\frac{1+m}{n}} \Gamma \left (\frac{1+m}{n},-b x^n\right )}{2 n}-\frac{e^{-a} x^{1+m} \left (b x^n\right )^{-\frac{1+m}{n}} \Gamma \left (\frac{1+m}{n},b x^n\right )}{2 n}\\ \end{align*}
Mathematica [A] time = 0.163619, size = 100, normalized size = 1.12 \[ -\frac{x^{m+1} \left (-b^2 x^{2 n}\right )^{-\frac{m+1}{n}} \left ((\cosh (a)-\sinh (a)) \left (-b x^n\right )^{\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},b x^n\right )+(\sinh (a)+\cosh (a)) \left (b x^n\right )^{\frac{m+1}{n}} \text{Gamma}\left (\frac{m+1}{n},-b x^n\right )\right )}{2 n} \]
Antiderivative was successfully verified.
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Maple [C] time = 0.102, size = 110, normalized size = 1.2 \begin{align*}{\frac{{x}^{1+m}\cosh \left ( a \right ) }{1+m}{\mbox{$_1$F$_2$}({\frac{m}{2\,n}}+{\frac{1}{2\,n}};\,{\frac{1}{2}},1+{\frac{m}{2\,n}}+{\frac{1}{2\,n}};\,{\frac{{x}^{2\,n}{b}^{2}}{4}})}}+{\frac{{x}^{m+n+1}b\sinh \left ( a \right ) }{m+n+1}{\mbox{$_1$F$_2$}({\frac{1}{2}}+{\frac{m}{2\,n}}+{\frac{1}{2\,n}};\,{\frac{3}{2}},{\frac{3}{2}}+{\frac{m}{2\,n}}+{\frac{1}{2\,n}};\,{\frac{{x}^{2\,n}{b}^{2}}{4}})}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.28248, size = 115, normalized size = 1.29 \begin{align*} -\frac{x^{m + 1} e^{\left (-a\right )} \Gamma \left (\frac{m + 1}{n}, b x^{n}\right )}{2 \, \left (b x^{n}\right )^{\frac{m + 1}{n}} n} - \frac{x^{m + 1} e^{a} \Gamma \left (\frac{m + 1}{n}, -b x^{n}\right )}{2 \, \left (-b x^{n}\right )^{\frac{m + 1}{n}} n} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (x^{m} \cosh \left (b x^{n} + a\right ), x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x^{m} \cosh{\left (a + b x^{n} \right )}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int x^{m} \cosh \left (b x^{n} + a\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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