Optimal. Leaf size=41 \[ -\frac{a^2 \log \left (a-b x^3\right )}{3 b^3}-\frac{a x^3}{3 b^2}-\frac{x^6}{6 b} \]
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Rubi [A] time = 0.0293576, antiderivative size = 41, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.143, Rules used = {266, 43} \[ -\frac{a^2 \log \left (a-b x^3\right )}{3 b^3}-\frac{a x^3}{3 b^2}-\frac{x^6}{6 b} \]
Antiderivative was successfully verified.
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Rule 266
Rule 43
Rubi steps
\begin{align*} \int \frac{x^8}{a-b x^3} \, dx &=\frac{1}{3} \operatorname{Subst}\left (\int \frac{x^2}{a-b x} \, dx,x,x^3\right )\\ &=\frac{1}{3} \operatorname{Subst}\left (\int \left (-\frac{a}{b^2}-\frac{x}{b}-\frac{a^2}{b^2 (-a+b x)}\right ) \, dx,x,x^3\right )\\ &=-\frac{a x^3}{3 b^2}-\frac{x^6}{6 b}-\frac{a^2 \log \left (a-b x^3\right )}{3 b^3}\\ \end{align*}
Mathematica [A] time = 0.0068252, size = 41, normalized size = 1. \[ -\frac{a^2 \log \left (a-b x^3\right )}{3 b^3}-\frac{a x^3}{3 b^2}-\frac{x^6}{6 b} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 37, normalized size = 0.9 \begin{align*} -{\frac{{x}^{6}}{6\,b}}-{\frac{a{x}^{3}}{3\,{b}^{2}}}-{\frac{{a}^{2}\ln \left ( b{x}^{3}-a \right ) }{3\,{b}^{3}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.02048, size = 49, normalized size = 1.2 \begin{align*} -\frac{a^{2} \log \left (b x^{3} - a\right )}{3 \, b^{3}} - \frac{b x^{6} + 2 \, a x^{3}}{6 \, b^{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.48899, size = 74, normalized size = 1.8 \begin{align*} -\frac{b^{2} x^{6} + 2 \, a b x^{3} + 2 \, a^{2} \log \left (b x^{3} - a\right )}{6 \, b^{3}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.496991, size = 34, normalized size = 0.83 \begin{align*} - \frac{a^{2} \log{\left (- a + b x^{3} \right )}}{3 b^{3}} - \frac{a x^{3}}{3 b^{2}} - \frac{x^{6}}{6 b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.10224, size = 50, normalized size = 1.22 \begin{align*} -\frac{a^{2} \log \left ({\left | b x^{3} - a \right |}\right )}{3 \, b^{3}} - \frac{b x^{6} + 2 \, a x^{3}}{6 \, b^{2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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