Optimal. Leaf size=103 \[ \frac{b \log (x)}{6 a^{4/3}}-\frac{b \log \left (\sqrt [3]{b x-a}+\sqrt [3]{a}\right )}{2 a^{4/3}}-\frac{b \tan ^{-1}\left (\frac{\sqrt [3]{a}-2 \sqrt [3]{b x-a}}{\sqrt{3} \sqrt [3]{a}}\right )}{\sqrt{3} a^{4/3}}+\frac{(b x-a)^{2/3}}{a x} \]
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Rubi [A] time = 0.0340923, antiderivative size = 103, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 5, integrand size = 15, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.333, Rules used = {51, 56, 617, 204, 31} \[ \frac{b \log (x)}{6 a^{4/3}}-\frac{b \log \left (\sqrt [3]{b x-a}+\sqrt [3]{a}\right )}{2 a^{4/3}}-\frac{b \tan ^{-1}\left (\frac{\sqrt [3]{a}-2 \sqrt [3]{b x-a}}{\sqrt{3} \sqrt [3]{a}}\right )}{\sqrt{3} a^{4/3}}+\frac{(b x-a)^{2/3}}{a x} \]
Antiderivative was successfully verified.
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Rule 51
Rule 56
Rule 617
Rule 204
Rule 31
Rubi steps
\begin{align*} \int \frac{1}{x^2 \sqrt [3]{-a+b x}} \, dx &=\frac{(-a+b x)^{2/3}}{a x}+\frac{b \int \frac{1}{x \sqrt [3]{-a+b x}} \, dx}{3 a}\\ &=\frac{(-a+b x)^{2/3}}{a x}+\frac{b \log (x)}{6 a^{4/3}}-\frac{b \operatorname{Subst}\left (\int \frac{1}{\sqrt [3]{a}+x} \, dx,x,\sqrt [3]{-a+b x}\right )}{2 a^{4/3}}+\frac{b \operatorname{Subst}\left (\int \frac{1}{a^{2/3}-\sqrt [3]{a} x+x^2} \, dx,x,\sqrt [3]{-a+b x}\right )}{2 a}\\ &=\frac{(-a+b x)^{2/3}}{a x}+\frac{b \log (x)}{6 a^{4/3}}-\frac{b \log \left (\sqrt [3]{a}+\sqrt [3]{-a+b x}\right )}{2 a^{4/3}}+\frac{b \operatorname{Subst}\left (\int \frac{1}{-3-x^2} \, dx,x,1-\frac{2 \sqrt [3]{-a+b x}}{\sqrt [3]{a}}\right )}{a^{4/3}}\\ &=\frac{(-a+b x)^{2/3}}{a x}-\frac{b \tan ^{-1}\left (\frac{1-\frac{2 \sqrt [3]{-a+b x}}{\sqrt [3]{a}}}{\sqrt{3}}\right )}{\sqrt{3} a^{4/3}}+\frac{b \log (x)}{6 a^{4/3}}-\frac{b \log \left (\sqrt [3]{a}+\sqrt [3]{-a+b x}\right )}{2 a^{4/3}}\\ \end{align*}
Mathematica [C] time = 0.0113463, size = 36, normalized size = 0.35 \[ \frac{3 b (b x-a)^{2/3} \, _2F_1\left (\frac{2}{3},2;\frac{5}{3};1-\frac{b x}{a}\right )}{2 a^2} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.006, size = 103, normalized size = 1. \begin{align*}{\frac{1}{ax} \left ( bx-a \right ) ^{{\frac{2}{3}}}}-{\frac{b}{3}\ln \left ( \sqrt [3]{a}+\sqrt [3]{bx-a} \right ){a}^{-{\frac{4}{3}}}}+{\frac{b}{6}\ln \left ( \left ( bx-a \right ) ^{{\frac{2}{3}}}-\sqrt [3]{a}\sqrt [3]{bx-a}+{a}^{{\frac{2}{3}}} \right ){a}^{-{\frac{4}{3}}}}+{\frac{b\sqrt{3}}{3}\arctan \left ({\frac{\sqrt{3}}{3} \left ( 2\,{\frac{\sqrt [3]{bx-a}}{\sqrt [3]{a}}}-1 \right ) } \right ){a}^{-{\frac{4}{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 = 1.57728, size = 865, normalized size = 8.4 \begin{align*} \left [\frac{3 \, \sqrt{\frac{1}{3}} a b x \sqrt{\frac{\left (-a\right )^{\frac{1}{3}}}{a}} \log \left (\frac{2 \, b x + 3 \, \sqrt{\frac{1}{3}}{\left (2 \,{\left (b x - a\right )}^{\frac{2}{3}} \left (-a\right )^{\frac{2}{3}} +{\left (b x - a\right )}^{\frac{1}{3}} a + \left (-a\right )^{\frac{1}{3}} a\right )} \sqrt{\frac{\left (-a\right )^{\frac{1}{3}}}{a}} - 3 \,{\left (b x - a\right )}^{\frac{1}{3}} \left (-a\right )^{\frac{2}{3}} - 3 \, a}{x}\right ) + \left (-a\right )^{\frac{2}{3}} b x \log \left ({\left (b x - a\right )}^{\frac{2}{3}} +{\left (b x - a\right )}^{\frac{1}{3}} \left (-a\right )^{\frac{1}{3}} + \left (-a\right )^{\frac{2}{3}}\right ) - 2 \, \left (-a\right )^{\frac{2}{3}} b x \log \left ({\left (b x - a\right )}^{\frac{1}{3}} - \left (-a\right )^{\frac{1}{3}}\right ) + 6 \,{\left (b x - a\right )}^{\frac{2}{3}} a}{6 \, a^{2} x}, \frac{6 \, \sqrt{\frac{1}{3}} a b x \sqrt{-\frac{\left (-a\right )^{\frac{1}{3}}}{a}} \arctan \left (\sqrt{\frac{1}{3}}{\left (2 \,{\left (b x - a\right )}^{\frac{1}{3}} + \left (-a\right )^{\frac{1}{3}}\right )} \sqrt{-\frac{\left (-a\right )^{\frac{1}{3}}}{a}}\right ) + \left (-a\right )^{\frac{2}{3}} b x \log \left ({\left (b x - a\right )}^{\frac{2}{3}} +{\left (b x - a\right )}^{\frac{1}{3}} \left (-a\right )^{\frac{1}{3}} + \left (-a\right )^{\frac{2}{3}}\right ) - 2 \, \left (-a\right )^{\frac{2}{3}} b x \log \left ({\left (b x - a\right )}^{\frac{1}{3}} - \left (-a\right )^{\frac{1}{3}}\right ) + 6 \,{\left (b x - a\right )}^{\frac{2}{3}} a}{6 \, a^{2} x}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 3.35895, size = 838, normalized size = 8.14 \begin{align*} \text{result too large to display} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 2.24496, size = 194, normalized size = 1.88 \begin{align*} -\frac{\frac{2 \, \sqrt{3} \left (-a\right )^{\frac{2}{3}} b^{2} \arctan \left (\frac{\sqrt{3}{\left (2 \,{\left (b x - a\right )}^{\frac{1}{3}} + \left (-a\right )^{\frac{1}{3}}\right )}}{3 \, \left (-a\right )^{\frac{1}{3}}}\right )}{a^{2}} - \frac{\left (-a\right )^{\frac{2}{3}} b^{2} \log \left ({\left (b x - a\right )}^{\frac{2}{3}} +{\left (b x - a\right )}^{\frac{1}{3}} \left (-a\right )^{\frac{1}{3}} + \left (-a\right )^{\frac{2}{3}}\right )}{a^{2}} + \frac{2 \, \left (-a\right )^{\frac{2}{3}} b^{2} \log \left ({\left |{\left (b x - a\right )}^{\frac{1}{3}} - \left (-a\right )^{\frac{1}{3}} \right |}\right )}{a^{2}} - \frac{6 \,{\left (b x - a\right )}^{\frac{2}{3}} b}{a x}}{6 \, b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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