Integrand size = 18, antiderivative size = 73 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {\sqrt {3} \arctan \left (\frac {a+2 \sqrt [3]{a^3-b^3 x}}{\sqrt {3} a}\right )}{a}-\frac {\log (x)}{2 a}+\frac {3 \log \left (a-\sqrt [3]{a^3-b^3 x}\right )}{2 a} \]
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Time = 0.02 (sec) , antiderivative size = 73, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.222, Rules used = {57, 631, 210, 31} \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {\sqrt {3} \arctan \left (\frac {2 \sqrt [3]{a^3-b^3 x}+a}{\sqrt {3} a}\right )}{a}+\frac {3 \log \left (a-\sqrt [3]{a^3-b^3 x}\right )}{2 a}-\frac {\log (x)}{2 a} \]
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Rule 31
Rule 57
Rule 210
Rule 631
Rubi steps \begin{align*} \text {integral}& = -\frac {\log (x)}{2 a}+\frac {3}{2} \text {Subst}\left (\int \frac {1}{a^2+a x+x^2} \, dx,x,\sqrt [3]{a^3-b^3 x}\right )-\frac {3 \text {Subst}\left (\int \frac {1}{a-x} \, dx,x,\sqrt [3]{a^3-b^3 x}\right )}{2 a} \\ & = -\frac {\log (x)}{2 a}+\frac {3 \log \left (a-\sqrt [3]{a^3-b^3 x}\right )}{2 a}-\frac {3 \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1+\frac {2 \sqrt [3]{a^3-b^3 x}}{a}\right )}{a} \\ & = \frac {\sqrt {3} \tan ^{-1}\left (\frac {1+\frac {2 \sqrt [3]{a^3-b^3 x}}{a}}{\sqrt {3}}\right )}{a}-\frac {\log (x)}{2 a}+\frac {3 \log \left (a-\sqrt [3]{a^3-b^3 x}\right )}{2 a} \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 101, normalized size of antiderivative = 1.38 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {2 \sqrt {3} \arctan \left (\frac {a+2 \sqrt [3]{a^3-b^3 x}}{\sqrt {3} a}\right )+2 \log \left (a-\sqrt [3]{a^3-b^3 x}\right )-\log \left (a^2+a \sqrt [3]{a^3-b^3 x}+\left (a^3-b^3 x\right )^{2/3}\right )}{2 a} \]
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Time = 0.38 (sec) , antiderivative size = 89, normalized size of antiderivative = 1.22
method | result | size |
pseudoelliptic | \(\frac {2 \sqrt {3}\, \arctan \left (\frac {\left (a +2 \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right ) \sqrt {3}}{3 a}\right )+2 \ln \left (-a +\left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right )-\ln \left (a^{2}+a \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}+\left (-b^{3} x +a^{3}\right )^{\frac {2}{3}}\right )}{2 a}\) | \(89\) |
derivativedivides | \(\frac {\ln \left (a -\left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right )}{a}+\frac {-\frac {\ln \left (a^{2}+a \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}+\left (-b^{3} x +a^{3}\right )^{\frac {2}{3}}\right )}{2}+\sqrt {3}\, \arctan \left (\frac {\left (a +2 \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right ) \sqrt {3}}{3 a}\right )}{a}\) | \(90\) |
default | \(\frac {\ln \left (a -\left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right )}{a}+\frac {-\frac {\ln \left (a^{2}+a \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}+\left (-b^{3} x +a^{3}\right )^{\frac {2}{3}}\right )}{2}+\sqrt {3}\, \arctan \left (\frac {\left (a +2 \left (-b^{3} x +a^{3}\right )^{\frac {1}{3}}\right ) \sqrt {3}}{3 a}\right )}{a}\) | \(90\) |
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Time = 0.23 (sec) , antiderivative size = 92, normalized size of antiderivative = 1.26 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {2 \, \sqrt {3} \arctan \left (\frac {\sqrt {3} a + 2 \, \sqrt {3} {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}}}{3 \, a}\right ) - \log \left (a^{2} + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}} a + {\left (-b^{3} x + a^{3}\right )}^{\frac {2}{3}}\right ) + 2 \, \log \left (-a + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}}\right )}{2 \, a} \]
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Result contains complex when optimal does not.
Time = 1.47 (sec) , antiderivative size = 136, normalized size of antiderivative = 1.86 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=- \frac {e^{- \frac {2 i \pi }{3}} \log {\left (- \frac {a e^{\frac {i \pi }{3}}}{b \sqrt [3]{- \frac {a^{3}}{b^{3}} + x}} + 1 \right )} \Gamma \left (- \frac {1}{3}\right )}{3 a \Gamma \left (\frac {2}{3}\right )} + \frac {e^{- \frac {i \pi }{3}} \log {\left (- \frac {a e^{i \pi }}{b \sqrt [3]{- \frac {a^{3}}{b^{3}} + x}} + 1 \right )} \Gamma \left (- \frac {1}{3}\right )}{3 a \Gamma \left (\frac {2}{3}\right )} - \frac {\log {\left (- \frac {a e^{\frac {5 i \pi }{3}}}{b \sqrt [3]{- \frac {a^{3}}{b^{3}} + x}} + 1 \right )} \Gamma \left (- \frac {1}{3}\right )}{3 a \Gamma \left (\frac {2}{3}\right )} \]
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Time = 0.33 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.23 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (a + 2 \, {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}}\right )}}{3 \, a}\right )}{a} - \frac {\log \left (a^{2} + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}} a + {\left (-b^{3} x + a^{3}\right )}^{\frac {2}{3}}\right )}{2 \, a} + \frac {\log \left (-a + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}}\right )}{a} \]
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Time = 0.29 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.25 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {\sqrt {3} \arctan \left (\frac {\sqrt {3} {\left (a + 2 \, {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}}\right )}}{3 \, a}\right )}{a} - \frac {\log \left (a^{2} + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}} a + {\left (-b^{3} x + a^{3}\right )}^{\frac {2}{3}}\right )}{2 \, a} + \frac {\log \left ({\left | -a + {\left (-b^{3} x + a^{3}\right )}^{\frac {1}{3}} \right |}\right )}{a} \]
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Time = 0.14 (sec) , antiderivative size = 108, normalized size of antiderivative = 1.48 \[ \int \frac {1}{x \sqrt [3]{a^3-b^3 x}} \, dx=\frac {\ln \left (9\,{\left (a^3-b^3\,x\right )}^{1/3}-9\,a\right )}{a}+\frac {\ln \left (9\,{\left (a^3-b^3\,x\right )}^{1/3}-\frac {9\,a\,{\left (-1+\sqrt {3}\,1{}\mathrm {i}\right )}^2}{4}\right )\,\left (-1+\sqrt {3}\,1{}\mathrm {i}\right )}{2\,a}-\frac {\ln \left (9\,{\left (a^3-b^3\,x\right )}^{1/3}-\frac {9\,a\,{\left (1+\sqrt {3}\,1{}\mathrm {i}\right )}^2}{4}\right )\,\left (1+\sqrt {3}\,1{}\mathrm {i}\right )}{2\,a} \]
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