Integrand size = 11, antiderivative size = 57 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {\arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}}+\frac {\text {arctanh}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}} \]
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Time = 0.01 (sec) , antiderivative size = 57, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.364, Rules used = {246, 218, 212, 209} \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {\arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}}+\frac {\text {arctanh}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}} \]
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Rule 209
Rule 212
Rule 218
Rule 246
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \frac {1}{1-b x^4} \, dx,x,\frac {x}{\sqrt [4]{a+b x^4}}\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {1}{1-\sqrt {b} x^2} \, dx,x,\frac {x}{\sqrt [4]{a+b x^4}}\right )+\frac {1}{2} \text {Subst}\left (\int \frac {1}{1+\sqrt {b} x^2} \, dx,x,\frac {x}{\sqrt [4]{a+b x^4}}\right ) \\ & = \frac {\tan ^{-1}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}}+\frac {\tanh ^{-1}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{2 \sqrt [4]{b}} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 76, normalized size of antiderivative = 1.33 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {2 \arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )-\log \left (1-\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )+\log \left (1+\frac {\sqrt [4]{b} x}{\sqrt [4]{a+b x^4}}\right )}{4 \sqrt [4]{b}} \]
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Time = 4.28 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.14
method | result | size |
pseudoelliptic | \(\frac {-2 \arctan \left (\frac {\left (b \,x^{4}+a \right )^{\frac {1}{4}}}{b^{\frac {1}{4}} x}\right )+\ln \left (\frac {-b^{\frac {1}{4}} x -\left (b \,x^{4}+a \right )^{\frac {1}{4}}}{b^{\frac {1}{4}} x -\left (b \,x^{4}+a \right )^{\frac {1}{4}}}\right )}{4 b^{\frac {1}{4}}}\) | \(65\) |
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Result contains complex when optimal does not.
Time = 0.25 (sec) , antiderivative size = 106, normalized size of antiderivative = 1.86 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {\log \left (\frac {b^{\frac {1}{4}} x + {\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}{4 \, b^{\frac {1}{4}}} - \frac {\log \left (-\frac {b^{\frac {1}{4}} x - {\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}{4 \, b^{\frac {1}{4}}} - \frac {i \, \log \left (\frac {i \, b^{\frac {1}{4}} x + {\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}{4 \, b^{\frac {1}{4}}} + \frac {i \, \log \left (\frac {-i \, b^{\frac {1}{4}} x + {\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}{4 \, b^{\frac {1}{4}}} \]
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Result contains complex when optimal does not.
Time = 0.51 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.63 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {x \Gamma \left (\frac {1}{4}\right ) {{}_{2}F_{1}\left (\begin {matrix} \frac {1}{4}, \frac {1}{4} \\ \frac {5}{4} \end {matrix}\middle | {\frac {b x^{4} e^{i \pi }}{a}} \right )}}{4 \sqrt [4]{a} \Gamma \left (\frac {5}{4}\right )} \]
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none
Time = 0.28 (sec) , antiderivative size = 68, normalized size of antiderivative = 1.19 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=-\frac {\arctan \left (\frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}}}{b^{\frac {1}{4}} x}\right )}{2 \, b^{\frac {1}{4}}} - \frac {\log \left (-\frac {b^{\frac {1}{4}} - \frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}}{b^{\frac {1}{4}} + \frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}}}{x}}\right )}{4 \, b^{\frac {1}{4}}} \]
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\[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\int { \frac {1}{{\left (b x^{4} + a\right )}^{\frac {1}{4}}} \,d x } \]
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Time = 5.70 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.65 \[ \int \frac {1}{\sqrt [4]{a+b x^4}} \, dx=\frac {x\,{\left (\frac {b\,x^4}{a}+1\right )}^{1/4}\,{{}}_2{\mathrm {F}}_1\left (\frac {1}{4},\frac {1}{4};\ \frac {5}{4};\ -\frac {b\,x^4}{a}\right )}{{\left (b\,x^4+a\right )}^{1/4}} \]
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