Integrand size = 15, antiderivative size = 25 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=-\frac {\sqrt {9-x^2}}{x}-\arcsin \left (\frac {x}{3}\right ) \]
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Time = 0.00 (sec) , antiderivative size = 25, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.133, Rules used = {283, 222} \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=-\arcsin \left (\frac {x}{3}\right )-\frac {\sqrt {9-x^2}}{x} \]
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Rule 222
Rule 283
Rubi steps \begin{align*} \text {integral}& = -\frac {\sqrt {9-x^2}}{x}-\int \frac {1}{\sqrt {9-x^2}} \, dx \\ & = -\frac {\sqrt {9-x^2}}{x}-\arcsin \left (\frac {x}{3}\right ) \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.48 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=-\frac {\sqrt {9-x^2}}{x}+2 \arctan \left (\frac {\sqrt {9-x^2}}{3+x}\right ) \]
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Time = 0.43 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.04
method | result | size |
risch | \(\frac {x^{2}-9}{x \sqrt {-x^{2}+9}}-\arcsin \left (\frac {x}{3}\right )\) | \(26\) |
pseudoelliptic | \(\frac {\arctan \left (\frac {\sqrt {-x^{2}+9}}{x}\right ) x -\sqrt {-x^{2}+9}}{x}\) | \(33\) |
default | \(-\frac {\left (-x^{2}+9\right )^{\frac {3}{2}}}{9 x}-\frac {x \sqrt {-x^{2}+9}}{9}-\arcsin \left (\frac {x}{3}\right )\) | \(34\) |
meijerg | \(-\frac {i \left (-\frac {12 i \sqrt {\pi }\, \sqrt {-\frac {x^{2}}{9}+1}}{x}-4 i \sqrt {\pi }\, \arcsin \left (\frac {x}{3}\right )\right )}{4 \sqrt {\pi }}\) | \(36\) |
trager | \(-\frac {\sqrt {-x^{2}+9}}{x}+\operatorname {RootOf}\left (\textit {\_Z}^{2}+1\right ) \ln \left (\operatorname {RootOf}\left (\textit {\_Z}^{2}+1\right ) x +\sqrt {-x^{2}+9}\right )\) | \(42\) |
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Time = 0.24 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.40 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=\frac {2 \, x \arctan \left (\frac {\sqrt {-x^{2} + 9} - 3}{x}\right ) - \sqrt {-x^{2} + 9}}{x} \]
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Time = 0.10 (sec) , antiderivative size = 15, normalized size of antiderivative = 0.60 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=- \operatorname {asin}{\left (\frac {x}{3} \right )} - \frac {\sqrt {9 - x^{2}}}{x} \]
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Time = 0.26 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.84 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=-\frac {\sqrt {-x^{2} + 9}}{x} - \arcsin \left (\frac {1}{3} \, x\right ) \]
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Time = 0.29 (sec) , antiderivative size = 39, normalized size of antiderivative = 1.56 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=\frac {x}{2 \, {\left (\sqrt {-x^{2} + 9} - 3\right )}} - \frac {\sqrt {-x^{2} + 9} - 3}{2 \, x} - \arcsin \left (\frac {1}{3} \, x\right ) \]
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Time = 0.04 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.84 \[ \int \frac {\sqrt {9-x^2}}{x^2} \, dx=-\mathrm {asin}\left (\frac {x}{3}\right )-\frac {\sqrt {9-x^2}}{x} \]
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