Optimal. Leaf size=45 \[ \frac{\log \left (\left (a+b x^n\right )^2+1\right )}{2 b n}+\frac{\left (a+b x^n\right ) \cot ^{-1}\left (a+b x^n\right )}{b n} \]
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Rubi [A] time = 0.0444314, antiderivative size = 45, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.286, Rules used = {6715, 5040, 4847, 260} \[ \frac{\log \left (\left (a+b x^n\right )^2+1\right )}{2 b n}+\frac{\left (a+b x^n\right ) \cot ^{-1}\left (a+b x^n\right )}{b n} \]
Antiderivative was successfully verified.
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Rule 6715
Rule 5040
Rule 4847
Rule 260
Rubi steps
\begin{align*} \int x^{-1+n} \cot ^{-1}\left (a+b x^n\right ) \, dx &=\frac{\operatorname{Subst}\left (\int \cot ^{-1}(a+b x) \, dx,x,x^n\right )}{n}\\ &=\frac{\operatorname{Subst}\left (\int \cot ^{-1}(x) \, dx,x,a+b x^n\right )}{b n}\\ &=\frac{\left (a+b x^n\right ) \cot ^{-1}\left (a+b x^n\right )}{b n}+\frac{\operatorname{Subst}\left (\int \frac{x}{1+x^2} \, dx,x,a+b x^n\right )}{b n}\\ &=\frac{\left (a+b x^n\right ) \cot ^{-1}\left (a+b x^n\right )}{b n}+\frac{\log \left (1+\left (a+b x^n\right )^2\right )}{2 b n}\\ \end{align*}
Mathematica [A] time = 0.0348946, size = 40, normalized size = 0.89 \[ \frac{\log \left (\left (a+b x^n\right )^2+1\right )+2 \left (a+b x^n\right ) \cot ^{-1}\left (a+b x^n\right )}{2 b n} \]
Antiderivative was successfully verified.
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Maple [C] time = 0.215, size = 149, normalized size = 3.3 \begin{align*}{\frac{{\frac{i}{2}}{x}^{n}\ln \left ( 1+i \left ( a+b{x}^{n} \right ) \right ) }{n}}-{\frac{{\frac{i}{2}}{x}^{n}\ln \left ( 1-i \left ( a+b{x}^{n} \right ) \right ) }{n}}-{\frac{{\frac{i}{2}}a}{bn}\ln \left ({\frac{i+a}{b}}+{x}^{n} \right ) }+{\frac{{\frac{i}{2}}a}{bn}\ln \left ({x}^{n}-{\frac{i-a}{b}} \right ) }+{\frac{\pi \,{x}^{n}}{2\,n}}+{\frac{1}{2\,bn}\ln \left ({\frac{i+a}{b}}+{x}^{n} \right ) }+{\frac{1}{2\,bn}\ln \left ({x}^{n}-{\frac{i-a}{b}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 0.962616, size = 51, normalized size = 1.13 \begin{align*} \frac{2 \,{\left (b x^{n} + a\right )} \operatorname{arccot}\left (b x^{n} + a\right ) + \log \left ({\left (b x^{n} + a\right )}^{2} + 1\right )}{2 \, b n} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.71834, size = 140, normalized size = 3.11 \begin{align*} \frac{2 \, b x^{n} \operatorname{arccot}\left (b x^{n} + a\right ) - 2 \, a \arctan \left (b x^{n} + a\right ) + \log \left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2} + 1\right )}{2 \, b n} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.10714, size = 88, normalized size = 1.96 \begin{align*} -\frac{b{\left (\frac{2 \, a \arctan \left (b x^{n} + a\right )}{b^{2}} - \frac{\log \left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2} + 1\right )}{b^{2}}\right )} - 2 \, x^{n} \arctan \left (\frac{1}{b x^{n} + a}\right )}{2 \, n} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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