Integrand size = 13, antiderivative size = 47 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=-\frac {\sqrt {1+x^3}}{6 x^6}+\frac {\sqrt {1+x^3}}{4 x^3}-\frac {1}{4} \text {arctanh}\left (\sqrt {1+x^3}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 47, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {272, 44, 65, 213} \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=-\frac {1}{4} \text {arctanh}\left (\sqrt {x^3+1}\right )+\frac {\sqrt {x^3+1}}{4 x^3}-\frac {\sqrt {x^3+1}}{6 x^6} \]
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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^3 \sqrt {1+x}} \, dx,x,x^3\right ) \\ & = -\frac {\sqrt {1+x^3}}{6 x^6}-\frac {1}{4} \text {Subst}\left (\int \frac {1}{x^2 \sqrt {1+x}} \, dx,x,x^3\right ) \\ & = -\frac {\sqrt {1+x^3}}{6 x^6}+\frac {\sqrt {1+x^3}}{4 x^3}+\frac {1}{8} \text {Subst}\left (\int \frac {1}{x \sqrt {1+x}} \, dx,x,x^3\right ) \\ & = -\frac {\sqrt {1+x^3}}{6 x^6}+\frac {\sqrt {1+x^3}}{4 x^3}+\frac {1}{4} \text {Subst}\left (\int \frac {1}{-1+x^2} \, dx,x,\sqrt {1+x^3}\right ) \\ & = -\frac {\sqrt {1+x^3}}{6 x^6}+\frac {\sqrt {1+x^3}}{4 x^3}-\frac {1}{4} \tanh ^{-1}\left (\sqrt {1+x^3}\right ) \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 38, normalized size of antiderivative = 0.81 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=\frac {\sqrt {1+x^3} \left (-2+3 x^3\right )}{12 x^6}-\frac {1}{4} \text {arctanh}\left (\sqrt {1+x^3}\right ) \]
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Time = 4.19 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.72
method | result | size |
risch | \(\frac {3 x^{6}+x^{3}-2}{12 x^{6} \sqrt {x^{3}+1}}-\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{4}\) | \(34\) |
default | \(-\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{4}-\frac {\sqrt {x^{3}+1}}{6 x^{6}}+\frac {\sqrt {x^{3}+1}}{4 x^{3}}\) | \(36\) |
elliptic | \(-\frac {\operatorname {arctanh}\left (\sqrt {x^{3}+1}\right )}{4}-\frac {\sqrt {x^{3}+1}}{6 x^{6}}+\frac {\sqrt {x^{3}+1}}{4 x^{3}}\) | \(36\) |
trager | \(\frac {\left (3 x^{3}-2\right ) \sqrt {x^{3}+1}}{12 x^{6}}-\frac {\ln \left (-\frac {x^{3}+2 \sqrt {x^{3}+1}+2}{x^{3}}\right )}{8}\) | \(43\) |
pseudoelliptic | \(\frac {3 \ln \left (-1+\sqrt {x^{3}+1}\right ) x^{6}-3 \ln \left (1+\sqrt {x^{3}+1}\right ) x^{6}+6 x^{3} \sqrt {x^{3}+1}-4 \sqrt {x^{3}+1}}{24 \left (-1+\sqrt {x^{3}+1}\right )^{2} \left (1+\sqrt {x^{3}+1}\right )^{2}}\) | \(77\) |
meijerg | \(\frac {-\frac {\sqrt {\pi }}{2 x^{6}}+\frac {\sqrt {\pi }}{2 x^{3}}+\frac {3 \left (\frac {7}{6}-2 \ln \left (2\right )+3 \ln \left (x \right )\right ) \sqrt {\pi }}{8}+\frac {\sqrt {\pi }\, \left (-7 x^{6}-8 x^{3}+8\right )}{16 x^{6}}-\frac {\sqrt {\pi }\, \left (-12 x^{3}+8\right ) \sqrt {x^{3}+1}}{16 x^{6}}-\frac {3 \sqrt {\pi }\, \ln \left (\frac {1}{2}+\frac {\sqrt {x^{3}+1}}{2}\right )}{4}}{3 \sqrt {\pi }}\) | \(97\) |
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Time = 0.26 (sec) , antiderivative size = 52, normalized size of antiderivative = 1.11 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=-\frac {3 \, x^{6} \log \left (\sqrt {x^{3} + 1} + 1\right ) - 3 \, x^{6} \log \left (\sqrt {x^{3} + 1} - 1\right ) - 2 \, {\left (3 \, x^{3} - 2\right )} \sqrt {x^{3} + 1}}{24 \, x^{6}} \]
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Time = 2.11 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.38 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=- \frac {\operatorname {asinh}{\left (\frac {1}{x^{\frac {3}{2}}} \right )}}{4} + \frac {1}{4 x^{\frac {3}{2}} \sqrt {1 + \frac {1}{x^{3}}}} + \frac {1}{12 x^{\frac {9}{2}} \sqrt {1 + \frac {1}{x^{3}}}} - \frac {1}{6 x^{\frac {15}{2}} \sqrt {1 + \frac {1}{x^{3}}}} \]
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Time = 0.20 (sec) , antiderivative size = 64, normalized size of antiderivative = 1.36 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=-\frac {3 \, {\left (x^{3} + 1\right )}^{\frac {3}{2}} - 5 \, \sqrt {x^{3} + 1}}{12 \, {\left (2 \, x^{3} - {\left (x^{3} + 1\right )}^{2} + 1\right )}} - \frac {1}{8} \, \log \left (\sqrt {x^{3} + 1} + 1\right ) + \frac {1}{8} \, \log \left (\sqrt {x^{3} + 1} - 1\right ) \]
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Time = 0.28 (sec) , antiderivative size = 50, normalized size of antiderivative = 1.06 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=\frac {3 \, {\left (x^{3} + 1\right )}^{\frac {3}{2}} - 5 \, \sqrt {x^{3} + 1}}{12 \, x^{6}} - \frac {1}{8} \, \log \left (\sqrt {x^{3} + 1} + 1\right ) + \frac {1}{8} \, \log \left ({\left | \sqrt {x^{3} + 1} - 1 \right |}\right ) \]
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Time = 0.07 (sec) , antiderivative size = 189, normalized size of antiderivative = 4.02 \[ \int \frac {1}{x^7 \sqrt {1+x^3}} \, dx=\frac {\sqrt {x^3+1}}{4\,x^3}-\frac {\sqrt {x^3+1}}{6\,x^6}-\frac {3\,\left (\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\sqrt {\frac {x-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{-\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\sqrt {\frac {x+1}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\sqrt {\frac {\frac {1}{2}-x+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\,\Pi \left (\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2};\mathrm {asin}\left (\sqrt {\frac {x+1}{\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}}\right )\middle |-\frac {\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}{-\frac {3}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}}\right )}{4\,\sqrt {x^3+\left (-\left (-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )-1\right )\,x-\left (-\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )}} \]
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