Integrand size = 15, antiderivative size = 32 \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\frac {\text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {\frac {a}{x^2}+b x^2}}\right )}{2 \sqrt {b}} \]
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Time = 0.01 (sec) , antiderivative size = 32, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {2004, 2033, 212} \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\frac {\text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {\frac {a}{x^2}+b x^2}}\right )}{2 \sqrt {b}} \]
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Rule 212
Rule 2004
Rule 2033
Rubi steps \begin{align*} \text {integral}& = \int \frac {1}{\sqrt {\frac {a}{x^2}+b x^2}} \, dx \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {x}{\sqrt {\frac {a}{x^2}+b x^2}}\right ) \\ & = \frac {\tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {\frac {a}{x^2}+b x^2}}\right )}{2 \sqrt {b}} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.88 \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\frac {\sqrt {a+b x^4} \log \left (\sqrt {b} x^2+\sqrt {a+b x^4}\right )}{2 \sqrt {b} x \sqrt {\frac {a+b x^4}{x^2}}} \]
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Time = 0.07 (sec) , antiderivative size = 49, normalized size of antiderivative = 1.53
method | result | size |
default | \(\frac {\sqrt {b \,x^{4}+a}\, \ln \left (x^{2} \sqrt {b}+\sqrt {b \,x^{4}+a}\right )}{2 \sqrt {\frac {b \,x^{4}+a}{x^{2}}}\, x \sqrt {b}}\) | \(49\) |
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Time = 0.29 (sec) , antiderivative size = 80, normalized size of antiderivative = 2.50 \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\left [\frac {\log \left (-2 \, b x^{4} - 2 \, \sqrt {b} x^{3} \sqrt {\frac {b x^{4} + a}{x^{2}}} - a\right )}{4 \, \sqrt {b}}, -\frac {\sqrt {-b} \arctan \left (\frac {\sqrt {-b} x^{3} \sqrt {\frac {b x^{4} + a}{x^{2}}}}{b x^{4} + a}\right )}{2 \, b}\right ] \]
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\[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\int \frac {1}{\sqrt {\frac {a + b x^{4}}{x^{2}}}}\, dx \]
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\[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\int { \frac {1}{\sqrt {\frac {b x^{4} + a}{x^{2}}}} \,d x } \]
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Time = 0.30 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.25 \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\frac {\log \left ({\left | a \right |}\right ) \mathrm {sgn}\left (x\right )}{4 \, \sqrt {b}} - \frac {\log \left ({\left | -\sqrt {b} x^{2} + \sqrt {b x^{4} + a} \right |}\right )}{2 \, \sqrt {b} \mathrm {sgn}\left (x\right )} \]
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Timed out. \[ \int \frac {1}{\sqrt {\frac {a+b x^4}{x^2}}} \, dx=\int \frac {1}{\sqrt {\frac {b\,x^4+a}{x^2}}} \,d x \]
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