Optimal. Leaf size=57 \[ -\frac {\sqrt {9+4 x^2}}{4 x^4}-\frac {\sqrt {9+4 x^2}}{18 x^2}+\frac {2}{27} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9+4 x^2}\right ) \]
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Rubi [A]
time = 0.02, antiderivative size = 57, normalized size of antiderivative = 1.00, number of steps
used = 5, number of rules used = 5, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {272, 43, 44, 65,
213} \begin {gather*} -\frac {\sqrt {4 x^2+9}}{18 x^2}+\frac {2}{27} \tanh ^{-1}\left (\frac {1}{3} \sqrt {4 x^2+9}\right )-\frac {\sqrt {4 x^2+9}}{4 x^4} \end {gather*}
Antiderivative was successfully verified.
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Rule 43
Rule 44
Rule 65
Rule 213
Rule 272
Rubi steps
\begin {align*} \int \frac {\sqrt {9+4 x^2}}{x^5} \, dx &=\frac {1}{2} \text {Subst}\left (\int \frac {\sqrt {9+4 x}}{x^3} \, dx,x,x^2\right )\\ &=-\frac {\sqrt {9+4 x^2}}{4 x^4}+\frac {1}{2} \text {Subst}\left (\int \frac {1}{x^2 \sqrt {9+4 x}} \, dx,x,x^2\right )\\ &=-\frac {\sqrt {9+4 x^2}}{4 x^4}-\frac {\sqrt {9+4 x^2}}{18 x^2}-\frac {1}{9} \text {Subst}\left (\int \frac {1}{x \sqrt {9+4 x}} \, dx,x,x^2\right )\\ &=-\frac {\sqrt {9+4 x^2}}{4 x^4}-\frac {\sqrt {9+4 x^2}}{18 x^2}-\frac {1}{18} \text {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}}{4 x^4}-\frac {\sqrt {9+4 x^2}}{18 x^2}+\frac {2}{27} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9+4 x^2}\right )\\ \end {align*}
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Mathematica [A]
time = 0.04, size = 46, normalized size = 0.81 \begin {gather*} \frac {\left (-9-2 x^2\right ) \sqrt {9+4 x^2}}{36 x^4}+\frac {2}{27} \tanh ^{-1}\left (\frac {1}{3} \sqrt {9+4 x^2}\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.09, size = 55, normalized size = 0.96
method | result | size |
trager | \(-\frac {\left (2 x^{2}+9\right ) \sqrt {4 x^{2}+9}}{36 x^{4}}-\frac {2 \ln \left (\frac {\sqrt {4 x^{2}+9}-3}{x}\right )}{27}\) | \(41\) |
risch | \(-\frac {8 x^{4}+54 x^{2}+81}{36 x^{4} \sqrt {4 x^{2}+9}}+\frac {2 \arctanh \left (\frac {3}{\sqrt {4 x^{2}+9}}\right )}{27}\) | \(42\) |
default | \(-\frac {\left (4 x^{2}+9\right )^{\frac {3}{2}}}{36 x^{4}}+\frac {\left (4 x^{2}+9\right )^{\frac {3}{2}}}{162 x^{2}}-\frac {2 \sqrt {4 x^{2}+9}}{81}+\frac {2 \arctanh \left (\frac {3}{\sqrt {4 x^{2}+9}}\right )}{27}\) | \(55\) |
meijerg | \(-\frac {4 \left (-\frac {81 \sqrt {\pi }\, \left (\frac {16}{81} x^{4}+\frac {32}{9} x^{2}+8\right )}{128 x^{4}}+\frac {81 \sqrt {\pi }\, \left (8+\frac {16 x^{2}}{9}\right ) \sqrt {1+\frac {4 x^{2}}{9}}}{128 x^{4}}-\frac {\sqrt {\pi }\, \ln \left (\frac {1}{2}+\frac {\sqrt {1+\frac {4 x^{2}}{9}}}{2}\right )}{2}+\frac {\left (\frac {1}{2}+2 \ln \left (x \right )-2 \ln \left (3\right )\right ) \sqrt {\pi }}{4}+\frac {81 \sqrt {\pi }}{16 x^{4}}+\frac {9 \sqrt {\pi }}{4 x^{2}}\right )}{27 \sqrt {\pi }}\) | \(101\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.49, size = 49, normalized size = 0.86 \begin {gather*} -\frac {2}{81} \, \sqrt {4 \, x^{2} + 9} + \frac {{\left (4 \, x^{2} + 9\right )}^{\frac {3}{2}}}{162 \, x^{2}} - \frac {{\left (4 \, x^{2} + 9\right )}^{\frac {3}{2}}}{36 \, x^{4}} + \frac {2}{27} \, \operatorname {arsinh}\left (\frac {3}{2 \, {\left | x \right |}}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 1.45, size = 64, normalized size = 1.12 \begin {gather*} \frac {8 \, x^{4} \log \left (-2 \, x + \sqrt {4 \, x^{2} + 9} + 3\right ) - 8 \, x^{4} \log \left (-2 \, x + \sqrt {4 \, x^{2} + 9} - 3\right ) - 3 \, \sqrt {4 \, x^{2} + 9} {\left (2 \, x^{2} + 9\right )}}{108 \, x^{4}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 1.86, size = 63, normalized size = 1.11 \begin {gather*} \frac {2 \operatorname {asinh}{\left (\frac {3}{2 x} \right )}}{27} - \frac {1}{9 x \sqrt {1 + \frac {9}{4 x^{2}}}} - \frac {3}{4 x^{3} \sqrt {1 + \frac {9}{4 x^{2}}}} - \frac {9}{8 x^{5} \sqrt {1 + \frac {9}{4 x^{2}}}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.60, size = 55, normalized size = 0.96 \begin {gather*} -\frac {{\left (4 \, x^{2} + 9\right )}^{\frac {3}{2}} + 9 \, \sqrt {4 \, x^{2} + 9}}{72 \, x^{4}} + \frac {1}{27} \, \log \left (\sqrt {4 \, x^{2} + 9} + 3\right ) - \frac {1}{27} \, \log \left (\sqrt {4 \, x^{2} + 9} - 3\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.03, size = 45, normalized size = 0.79 \begin {gather*} \frac {2\,\mathrm {atanh}\left (\frac {2\,\sqrt {x^2+\frac {9}{4}}}{3}\right )}{27}+\frac {\sqrt {x^2+\frac {9}{4}}\,\left (\frac {2}{3\,x^2}-\frac {1}{x^4}\right )}{2}-\frac {4\,\sqrt {x^2+\frac {9}{4}}}{9\,x^2} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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