Integrand size = 15, antiderivative size = 30 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {9-x^2}-3 \text {arctanh}\left (\frac {\sqrt {9-x^2}}{3}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 30, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.267, Rules used = {272, 52, 65, 212} \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {9-x^2}-3 \text {arctanh}\left (\frac {\sqrt {9-x^2}}{3}\right ) \]
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Rule 52
Rule 65
Rule 212
Rule 272
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {\sqrt {9-x}}{x} \, dx,x,x^2\right ) \\ & = \sqrt {9-x^2}+\frac {9}{2} \text {Subst}\left (\int \frac {1}{\sqrt {9-x} x} \, dx,x,x^2\right ) \\ & = \sqrt {9-x^2}-9 \text {Subst}\left (\int \frac {1}{9-x^2} \, dx,x,\sqrt {9-x^2}\right ) \\ & = \sqrt {9-x^2}-3 \text {arctanh}\left (\frac {\sqrt {9-x^2}}{3}\right ) \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 30, normalized size of antiderivative = 1.00 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {9-x^2}-3 \text {arctanh}\left (\frac {\sqrt {9-x^2}}{3}\right ) \]
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Time = 0.19 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.83
method | result | size |
default | \(\sqrt {-x^{2}+9}-3 \,\operatorname {arctanh}\left (\frac {3}{\sqrt {-x^{2}+9}}\right )\) | \(25\) |
trager | \(\sqrt {-x^{2}+9}-3 \ln \left (\frac {\sqrt {-x^{2}+9}+3}{x}\right )\) | \(29\) |
pseudoelliptic | \(\sqrt {-x^{2}+9}-\frac {3 \ln \left (\sqrt {-x^{2}+9}+3\right )}{2}+\frac {3 \ln \left (\sqrt {-x^{2}+9}-3\right )}{2}\) | \(39\) |
meijerg | \(-\frac {3 \left (-2 \left (2-2 \ln \left (2\right )+2 \ln \left (x \right )-2 \ln \left (3\right )+i \pi \right ) \sqrt {\pi }+4 \sqrt {\pi }-4 \sqrt {\pi }\, \sqrt {-\frac {x^{2}}{9}+1}+4 \sqrt {\pi }\, \ln \left (\frac {1}{2}+\frac {\sqrt {-\frac {x^{2}}{9}+1}}{2}\right )\right )}{4 \sqrt {\pi }}\) | \(68\) |
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none
Time = 0.24 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.93 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {-x^{2} + 9} + 3 \, \log \left (\frac {\sqrt {-x^{2} + 9} - 3}{x}\right ) \]
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Result contains complex when optimal does not.
Time = 0.78 (sec) , antiderivative size = 66, normalized size of antiderivative = 2.20 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\begin {cases} i \sqrt {x^{2} - 9} - 3 \log {\left (x \right )} + \frac {3 \log {\left (x^{2} \right )}}{2} + 3 i \operatorname {asin}{\left (\frac {3}{x} \right )} & \text {for}\: \left |{x^{2}}\right | > 9 \\\sqrt {9 - x^{2}} + \frac {3 \log {\left (x^{2} \right )}}{2} - 3 \log {\left (\sqrt {1 - \frac {x^{2}}{9}} + 1 \right )} & \text {otherwise} \end {cases} \]
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Time = 0.27 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.17 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {-x^{2} + 9} - 3 \, \log \left (\frac {6 \, \sqrt {-x^{2} + 9}}{{\left | x \right |}} + \frac {18}{{\left | x \right |}}\right ) \]
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Time = 0.35 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.33 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=\sqrt {-x^{2} + 9} - \frac {3}{2} \, \log \left (\sqrt {-x^{2} + 9} + 3\right ) + \frac {3}{2} \, \log \left (-\sqrt {-x^{2} + 9} + 3\right ) \]
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Time = 0.07 (sec) , antiderivative size = 30, normalized size of antiderivative = 1.00 \[ \int \frac {\sqrt {9-x^2}}{x} \, dx=3\,\ln \left (\sqrt {\frac {9}{x^2}-1}-3\,\sqrt {\frac {1}{x^2}}\right )+\sqrt {9-x^2} \]
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