Optimal. Leaf size=39 \[ \frac {2}{3} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9-4 x^2}\right )-\frac {\sqrt {9-4 x^2}}{2 x^2} \]
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Rubi [A] time = 0.02, antiderivative size = 39, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.267, Rules used = {266, 47, 63, 206} \[ \frac {2}{3} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9-4 x^2}\right )-\frac {\sqrt {9-4 x^2}}{2 x^2} \]
Antiderivative was successfully verified.
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Rule 47
Rule 63
Rule 206
Rule 266
Rubi steps
\begin {align*} \int \frac {\sqrt {9-4 x^2}}{x^3} \, dx &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {\sqrt {9-4 x}}{x^2} \, dx,x,x^2\right )\\ &=-\frac {\sqrt {9-4 x^2}}{2 x^2}-\operatorname {Subst}\left (\int \frac {1}{\sqrt {9-4 x} x} \, dx,x,x^2\right )\\ &=-\frac {\sqrt {9-4 x^2}}{2 x^2}+\frac {1}{2} \operatorname {Subst}\left (\int \frac {1}{\frac {9}{4}-\frac {x^2}{4}} \, dx,x,\sqrt {9-4 x^2}\right )\\ &=-\frac {\sqrt {9-4 x^2}}{2 x^2}+\frac {2}{3} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9-4 x^2}\right )\\ \end {align*}
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Mathematica [A] time = 0.03, size = 37, normalized size = 0.95 \[ \frac {2}{3} \tanh ^{-1}\left (\sqrt {1-\frac {4 x^2}{9}}\right )-\frac {\sqrt {9-4 x^2}}{2 x^2} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.92, size = 38, normalized size = 0.97 \[ -\frac {4 \, x^{2} \log \left (\frac {\sqrt {-4 \, x^{2} + 9} - 3}{x}\right ) + 3 \, \sqrt {-4 \, x^{2} + 9}}{6 \, x^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 1.07, size = 45, normalized size = 1.15 \[ -\frac {\sqrt {-4 \, x^{2} + 9}}{2 \, x^{2}} + \frac {1}{3} \, \log \left (\sqrt {-4 \, x^{2} + 9} + 3\right ) - \frac {1}{3} \, \log \left (-\sqrt {-4 \, x^{2} + 9} + 3\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.01, size = 41, normalized size = 1.05 \[ \frac {2 \arctanh \left (\frac {3}{\sqrt {-4 x^{2}+9}}\right )}{3}-\frac {\left (-4 x^{2}+9\right )^{\frac {3}{2}}}{18 x^{2}}-\frac {2 \sqrt {-4 x^{2}+9}}{9} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 2.99, size = 51, normalized size = 1.31 \[ -\frac {2}{9} \, \sqrt {-4 \, x^{2} + 9} - \frac {{\left (-4 \, x^{2} + 9\right )}^{\frac {3}{2}}}{18 \, x^{2}} + \frac {2}{3} \, \log \left (\frac {6 \, \sqrt {-4 \, x^{2} + 9}}{{\left | x \right |}} + \frac {18}{{\left | x \right |}}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 4.66, size = 35, normalized size = 0.90 \[ -\frac {2\,\ln \left (\sqrt {\frac {9}{4\,x^2}-1}-\frac {3\,\sqrt {\frac {1}{x^2}}}{2}\right )}{3}-\frac {\sqrt {\frac {9}{4}-x^2}}{x^2} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 1.73, size = 97, normalized size = 2.49 \[ \begin {cases} \frac {2 \operatorname {acosh}{\left (\frac {3}{2 x} \right )}}{3} + \frac {1}{x \sqrt {-1 + \frac {9}{4 x^{2}}}} - \frac {9}{4 x^{3} \sqrt {-1 + \frac {9}{4 x^{2}}}} & \text {for}\: \frac {9}{4 \left |{x^{2}}\right |} > 1 \\- \frac {2 i \operatorname {asin}{\left (\frac {3}{2 x} \right )}}{3} - \frac {i}{x \sqrt {1 - \frac {9}{4 x^{2}}}} + \frac {9 i}{4 x^{3} \sqrt {1 - \frac {9}{4 x^{2}}}} & \text {otherwise} \end {cases} \]
Verification of antiderivative is not currently implemented for this CAS.
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