Optimal. Leaf size=115 \[ -\frac{\log \left (a^{2/3} x^2+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )}{6 \sqrt [3]{a} b^{2/3}}+\frac{\log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )}{3 \sqrt [3]{a} b^{2/3}}-\frac{\tan ^{-1}\left (\frac{2 \sqrt [3]{a} x+\sqrt [3]{b}}{\sqrt{3} \sqrt [3]{b}}\right )}{\sqrt{3} \sqrt [3]{a} b^{2/3}} \]
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Rubi [A] time = 0.066438, antiderivative size = 115, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 6, integrand size = 11, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.546, Rules used = {200, 31, 634, 617, 204, 628} \[ -\frac{\log \left (a^{2/3} x^2+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )}{6 \sqrt [3]{a} b^{2/3}}+\frac{\log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )}{3 \sqrt [3]{a} b^{2/3}}-\frac{\tan ^{-1}\left (\frac{2 \sqrt [3]{a} x+\sqrt [3]{b}}{\sqrt{3} \sqrt [3]{b}}\right )}{\sqrt{3} \sqrt [3]{a} b^{2/3}} \]
Antiderivative was successfully verified.
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Rule 200
Rule 31
Rule 634
Rule 617
Rule 204
Rule 628
Rubi steps
\begin{align*} \int \frac{1}{-b+a x^3} \, dx &=\frac{\int \frac{1}{-\sqrt [3]{b}+\sqrt [3]{a} x} \, dx}{3 b^{2/3}}+\frac{\int \frac{-2 \sqrt [3]{b}-\sqrt [3]{a} x}{b^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{3 b^{2/3}}\\ &=\frac{\log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )}{3 \sqrt [3]{a} b^{2/3}}-\frac{\int \frac{\sqrt [3]{a} \sqrt [3]{b}+2 a^{2/3} x}{b^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{6 \sqrt [3]{a} b^{2/3}}-\frac{\int \frac{1}{b^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2} \, dx}{2 \sqrt [3]{b}}\\ &=\frac{\log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )}{3 \sqrt [3]{a} b^{2/3}}-\frac{\log \left (b^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2\right )}{6 \sqrt [3]{a} b^{2/3}}+\frac{\operatorname{Subst}\left (\int \frac{1}{-3-x^2} \, dx,x,1+\frac{2 \sqrt [3]{a} x}{\sqrt [3]{b}}\right )}{\sqrt [3]{a} b^{2/3}}\\ &=-\frac{\tan ^{-1}\left (\frac{\sqrt [3]{b}+2 \sqrt [3]{a} x}{\sqrt{3} \sqrt [3]{b}}\right )}{\sqrt{3} \sqrt [3]{a} b^{2/3}}+\frac{\log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )}{3 \sqrt [3]{a} b^{2/3}}-\frac{\log \left (b^{2/3}+\sqrt [3]{a} \sqrt [3]{b} x+a^{2/3} x^2\right )}{6 \sqrt [3]{a} b^{2/3}}\\ \end{align*}
Mathematica [A] time = 0.0293769, size = 89, normalized size = 0.77 \[ -\frac{\log \left (a^{2/3} x^2+\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3}\right )-2 \log \left (\sqrt [3]{b}-\sqrt [3]{a} x\right )+2 \sqrt{3} \tan ^{-1}\left (\frac{\frac{2 \sqrt [3]{a} x}{\sqrt [3]{b}}+1}{\sqrt{3}}\right )}{6 \sqrt [3]{a} b^{2/3}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 92, normalized size = 0.8 \begin{align*}{\frac{1}{3\,a}\ln \left ( x-\sqrt [3]{{\frac{b}{a}}} \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}}-{\frac{1}{6\,a}\ln \left ({x}^{2}+\sqrt [3]{{\frac{b}{a}}}x+ \left ({\frac{b}{a}} \right ) ^{{\frac{2}{3}}} \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}}-{\frac{\sqrt{3}}{3\,a}\arctan \left ({\frac{\sqrt{3}}{3} \left ( 2\,{x{\frac{1}{\sqrt [3]{{\frac{b}{a}}}}}}+1 \right ) } \right ) \left ({\frac{b}{a}} \right ) ^{-{\frac{2}{3}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.9372, size = 751, normalized size = 6.53 \begin{align*} \left [\frac{3 \, \sqrt{\frac{1}{3}} a b \sqrt{-\frac{\left (a b^{2}\right )^{\frac{1}{3}}}{a}} \log \left (\frac{2 \, a b x^{3} - 3 \, \left (a b^{2}\right )^{\frac{1}{3}} b x + b^{2} - 3 \, \sqrt{\frac{1}{3}}{\left (2 \, a b x^{2} - \left (a b^{2}\right )^{\frac{2}{3}} x - \left (a b^{2}\right )^{\frac{1}{3}} b\right )} \sqrt{-\frac{\left (a b^{2}\right )^{\frac{1}{3}}}{a}}}{a x^{3} - b}\right ) - \left (a b^{2}\right )^{\frac{2}{3}} \log \left (a b x^{2} + \left (a b^{2}\right )^{\frac{2}{3}} x + \left (a b^{2}\right )^{\frac{1}{3}} b\right ) + 2 \, \left (a b^{2}\right )^{\frac{2}{3}} \log \left (a b x - \left (a b^{2}\right )^{\frac{2}{3}}\right )}{6 \, a b^{2}}, -\frac{6 \, \sqrt{\frac{1}{3}} a b \sqrt{\frac{\left (a b^{2}\right )^{\frac{1}{3}}}{a}} \arctan \left (\frac{\sqrt{\frac{1}{3}}{\left (2 \, \left (a b^{2}\right )^{\frac{2}{3}} x + \left (a b^{2}\right )^{\frac{1}{3}} b\right )} \sqrt{\frac{\left (a b^{2}\right )^{\frac{1}{3}}}{a}}}{b^{2}}\right ) + \left (a b^{2}\right )^{\frac{2}{3}} \log \left (a b x^{2} + \left (a b^{2}\right )^{\frac{2}{3}} x + \left (a b^{2}\right )^{\frac{1}{3}} b\right ) - 2 \, \left (a b^{2}\right )^{\frac{2}{3}} \log \left (a b x - \left (a b^{2}\right )^{\frac{2}{3}}\right )}{6 \, a b^{2}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.145288, size = 20, normalized size = 0.17 \begin{align*} \operatorname{RootSum}{\left (27 t^{3} a b^{2} - 1, \left ( t \mapsto t \log{\left (- 3 t b + x \right )} \right )\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.10683, size = 140, normalized size = 1.22 \begin{align*} \frac{\left (\frac{b}{a}\right )^{\frac{1}{3}} \log \left ({\left | x - \left (\frac{b}{a}\right )^{\frac{1}{3}} \right |}\right )}{3 \, b} - \frac{\sqrt{3} \left (a^{2} b\right )^{\frac{1}{3}} \arctan \left (\frac{\sqrt{3}{\left (2 \, x + \left (\frac{b}{a}\right )^{\frac{1}{3}}\right )}}{3 \, \left (\frac{b}{a}\right )^{\frac{1}{3}}}\right )}{3 \, a b} - \frac{\left (a^{2} b\right )^{\frac{1}{3}} \log \left (x^{2} + x \left (\frac{b}{a}\right )^{\frac{1}{3}} + \left (\frac{b}{a}\right )^{\frac{2}{3}}\right )}{6 \, a b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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