Optimal. Leaf size=69 \[ -\frac{2 \sqrt{2 \pi } \left (a x^n\right )^{2/n} \text{Erf}\left (\frac{\sqrt{2} \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )}{n^{3/2} x^2}-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}} \]
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Rubi [A] time = 0.0571192, antiderivative size = 69, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.286, Rules used = {2306, 2310, 2180, 2205} \[ -\frac{2 \sqrt{2 \pi } \left (a x^n\right )^{2/n} \text{Erf}\left (\frac{\sqrt{2} \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )}{n^{3/2} x^2}-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}} \]
Antiderivative was successfully verified.
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Rule 2306
Rule 2310
Rule 2180
Rule 2205
Rubi steps
\begin{align*} \int \frac{1}{x^3 \log ^{\frac{3}{2}}\left (a x^n\right )} \, dx &=-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}}-\frac{4 \int \frac{1}{x^3 \sqrt{\log \left (a x^n\right )}} \, dx}{n}\\ &=-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}}-\frac{\left (4 \left (a x^n\right )^{2/n}\right ) \operatorname{Subst}\left (\int \frac{e^{-\frac{2 x}{n}}}{\sqrt{x}} \, dx,x,\log \left (a x^n\right )\right )}{n^2 x^2}\\ &=-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}}-\frac{\left (8 \left (a x^n\right )^{2/n}\right ) \operatorname{Subst}\left (\int e^{-\frac{2 x^2}{n}} \, dx,x,\sqrt{\log \left (a x^n\right )}\right )}{n^2 x^2}\\ &=-\frac{2 \sqrt{2 \pi } \left (a x^n\right )^{2/n} \text{erf}\left (\frac{\sqrt{2} \sqrt{\log \left (a x^n\right )}}{\sqrt{n}}\right )}{n^{3/2} x^2}-\frac{2}{n x^2 \sqrt{\log \left (a x^n\right )}}\\ \end{align*}
Mathematica [A] time = 0.0468122, size = 66, normalized size = 0.96 \[ \frac{2 \left (\sqrt{2} \left (a x^n\right )^{2/n} \sqrt{\frac{\log \left (a x^n\right )}{n}} \text{Gamma}\left (\frac{1}{2},\frac{2 \log \left (a x^n\right )}{n}\right )-1\right )}{n x^2 \sqrt{\log \left (a x^n\right )}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.168, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{{x}^{3}} \left ( \ln \left ( a{x}^{n} \right ) \right ) ^{-{\frac{3}{2}}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{x^{3} \log \left (a x^{n}\right )^{\frac{3}{2}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: UnboundLocalError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{x^{3} \log{\left (a x^{n} \right )}^{\frac{3}{2}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{x^{3} \log \left (a x^{n}\right )^{\frac{3}{2}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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