Integrand size = 13, antiderivative size = 31 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {1+x^3}}{3 x^3}+\frac {1}{3} \text {arctanh}\left (\sqrt {1+x^3}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 31, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {272, 44, 65, 213} \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=\frac {1}{3} \text {arctanh}\left (\sqrt {x^3+1}\right )-\frac {\sqrt {x^3+1}}{3 x^3} \]
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Rule 44
Rule 65
Rule 213
Rule 272
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \text {Subst}\left (\int \frac {1}{x^2 \sqrt {1+x}} \, dx,x,x^3\right ) \\ & = -\frac {\sqrt {1+x^3}}{3 x^3}-\frac {1}{6} \text {Subst}\left (\int \frac {1}{x \sqrt {1+x}} \, dx,x,x^3\right ) \\ & = -\frac {\sqrt {1+x^3}}{3 x^3}-\frac {1}{3} \text {Subst}\left (\int \frac {1}{-1+x^2} \, dx,x,\sqrt {1+x^3}\right ) \\ & = -\frac {\sqrt {1+x^3}}{3 x^3}+\frac {1}{3} \text {arctanh}\left (\sqrt {1+x^3}\right ) \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 31, normalized size of antiderivative = 1.00 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {1+x^3}}{3 x^3}+\frac {1}{3} \text {arctanh}\left (\sqrt {1+x^3}\right ) \]
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Time = 2.08 (sec) , antiderivative size = 24, normalized size of antiderivative = 0.77
method | result | size |
default | \(-\frac {\sqrt {x^{3}+1}}{3 x^{3}}+\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{3}\) | \(24\) |
risch | \(-\frac {\sqrt {x^{3}+1}}{3 x^{3}}+\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{3}\) | \(24\) |
elliptic | \(-\frac {\sqrt {x^{3}+1}}{3 x^{3}}+\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{3}\) | \(24\) |
trager | \(-\frac {\sqrt {x^{3}+1}}{3 x^{3}}-\frac {\ln \left (-\frac {-x^{3}+2 \sqrt {x^{3}+1}-2}{x^{3}}\right )}{6}\) | \(38\) |
pseudoelliptic | \(\frac {-\ln \left (\sqrt {x^{3}+1}-1\right ) x^{3}+\ln \left (\sqrt {x^{3}+1}+1\right ) x^{3}-2 \sqrt {x^{3}+1}}{6 x^{3}}\) | \(45\) |
meijerg | \(\frac {\frac {\sqrt {\pi }\, \left (4 x^{3}+8\right )}{8 x^{3}}-\frac {\sqrt {\pi }\, \sqrt {x^{3}+1}}{x^{3}}+\sqrt {\pi }\, \ln \left (\frac {1}{2}+\frac {\sqrt {x^{3}+1}}{2}\right )-\frac {\left (1-2 \ln \left (2\right )+3 \ln \left (x \right )\right ) \sqrt {\pi }}{2}-\frac {\sqrt {\pi }}{x^{3}}}{3 \sqrt {\pi }}\) | \(76\) |
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Time = 0.25 (sec) , antiderivative size = 44, normalized size of antiderivative = 1.42 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=\frac {x^{3} \log \left (\sqrt {x^{3} + 1} + 1\right ) - x^{3} \log \left (\sqrt {x^{3} + 1} - 1\right ) - 2 \, \sqrt {x^{3} + 1}}{6 \, x^{3}} \]
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Time = 0.92 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.84 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=\frac {\operatorname {asinh}{\left (\frac {1}{x^{\frac {3}{2}}} \right )}}{3} - \frac {\sqrt {1 + \frac {1}{x^{3}}}}{3 x^{\frac {3}{2}}} \]
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Time = 0.19 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.19 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {x^{3} + 1}}{3 \, x^{3}} + \frac {1}{6} \, \log \left (\sqrt {x^{3} + 1} + 1\right ) - \frac {1}{6} \, \log \left (\sqrt {x^{3} + 1} - 1\right ) \]
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Time = 0.26 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.23 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {x^{3} + 1}}{3 \, x^{3}} + \frac {1}{6} \, \log \left (\sqrt {x^{3} + 1} + 1\right ) - \frac {1}{6} \, \log \left ({\left | \sqrt {x^{3} + 1} - 1 \right |}\right ) \]
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Time = 0.17 (sec) , antiderivative size = 176, normalized size of antiderivative = 5.68 \[ \int \frac {1}{x^4 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {x^3+1}}{3\,x^3}+\frac {\left (\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\sqrt {\frac {x-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{-\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\sqrt {\frac {x+1}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\sqrt {\frac {\frac {1}{2}-x+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\Pi \left (\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2};\mathrm {asin}\left (\sqrt {\frac {x+1}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\right )\middle |-\frac {\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{-\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}\right )}{\sqrt {x^3+\left (-\left (-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )-1\right )\,x-\left (-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )}} \]
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