Optimal. Leaf size=95 \[ \frac{b^2 \sqrt{a+b x^2}}{16 a^2 x^2}-\frac{b^3 \tanh ^{-1}\left (\frac{\sqrt{a+b x^2}}{\sqrt{a}}\right )}{16 a^{5/2}}-\frac{b \sqrt{a+b x^2}}{24 a x^4}-\frac{\sqrt{a+b x^2}}{6 x^6} \]
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Rubi [A] time = 0.05173, antiderivative size = 95, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 5, integrand size = 15, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.333, Rules used = {266, 47, 51, 63, 208} \[ \frac{b^2 \sqrt{a+b x^2}}{16 a^2 x^2}-\frac{b^3 \tanh ^{-1}\left (\frac{\sqrt{a+b x^2}}{\sqrt{a}}\right )}{16 a^{5/2}}-\frac{b \sqrt{a+b x^2}}{24 a x^4}-\frac{\sqrt{a+b x^2}}{6 x^6} \]
Antiderivative was successfully verified.
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Rule 266
Rule 47
Rule 51
Rule 63
Rule 208
Rubi steps
\begin{align*} \int \frac{\sqrt{a+b x^2}}{x^7} \, dx &=\frac{1}{2} \operatorname{Subst}\left (\int \frac{\sqrt{a+b x}}{x^4} \, dx,x,x^2\right )\\ &=-\frac{\sqrt{a+b x^2}}{6 x^6}+\frac{1}{12} b \operatorname{Subst}\left (\int \frac{1}{x^3 \sqrt{a+b x}} \, dx,x,x^2\right )\\ &=-\frac{\sqrt{a+b x^2}}{6 x^6}-\frac{b \sqrt{a+b x^2}}{24 a x^4}-\frac{b^2 \operatorname{Subst}\left (\int \frac{1}{x^2 \sqrt{a+b x}} \, dx,x,x^2\right )}{16 a}\\ &=-\frac{\sqrt{a+b x^2}}{6 x^6}-\frac{b \sqrt{a+b x^2}}{24 a x^4}+\frac{b^2 \sqrt{a+b x^2}}{16 a^2 x^2}+\frac{b^3 \operatorname{Subst}\left (\int \frac{1}{x \sqrt{a+b x}} \, dx,x,x^2\right )}{32 a^2}\\ &=-\frac{\sqrt{a+b x^2}}{6 x^6}-\frac{b \sqrt{a+b x^2}}{24 a x^4}+\frac{b^2 \sqrt{a+b x^2}}{16 a^2 x^2}+\frac{b^2 \operatorname{Subst}\left (\int \frac{1}{-\frac{a}{b}+\frac{x^2}{b}} \, dx,x,\sqrt{a+b x^2}\right )}{16 a^2}\\ &=-\frac{\sqrt{a+b x^2}}{6 x^6}-\frac{b \sqrt{a+b x^2}}{24 a x^4}+\frac{b^2 \sqrt{a+b x^2}}{16 a^2 x^2}-\frac{b^3 \tanh ^{-1}\left (\frac{\sqrt{a+b x^2}}{\sqrt{a}}\right )}{16 a^{5/2}}\\ \end{align*}
Mathematica [C] time = 0.0077977, size = 39, normalized size = 0.41 \[ \frac{b^3 \left (a+b x^2\right )^{3/2} \, _2F_1\left (\frac{3}{2},4;\frac{5}{2};\frac{b x^2}{a}+1\right )}{3 a^4} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.007, size = 105, normalized size = 1.1 \begin{align*} -{\frac{1}{6\,a{x}^{6}} \left ( b{x}^{2}+a \right ) ^{{\frac{3}{2}}}}+{\frac{b}{8\,{a}^{2}{x}^{4}} \left ( b{x}^{2}+a \right ) ^{{\frac{3}{2}}}}-{\frac{{b}^{2}}{16\,{a}^{3}{x}^{2}} \left ( b{x}^{2}+a \right ) ^{{\frac{3}{2}}}}-{\frac{{b}^{3}}{16}\ln \left ({\frac{1}{x} \left ( 2\,a+2\,\sqrt{a}\sqrt{b{x}^{2}+a} \right ) } \right ){a}^{-{\frac{5}{2}}}}+{\frac{{b}^{3}}{16\,{a}^{3}}\sqrt{b{x}^{2}+a}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.63721, size = 367, normalized size = 3.86 \begin{align*} \left [\frac{3 \, \sqrt{a} b^{3} x^{6} \log \left (-\frac{b x^{2} - 2 \, \sqrt{b x^{2} + a} \sqrt{a} + 2 \, a}{x^{2}}\right ) + 2 \,{\left (3 \, a b^{2} x^{4} - 2 \, a^{2} b x^{2} - 8 \, a^{3}\right )} \sqrt{b x^{2} + a}}{96 \, a^{3} x^{6}}, \frac{3 \, \sqrt{-a} b^{3} x^{6} \arctan \left (\frac{\sqrt{-a}}{\sqrt{b x^{2} + a}}\right ) +{\left (3 \, a b^{2} x^{4} - 2 \, a^{2} b x^{2} - 8 \, a^{3}\right )} \sqrt{b x^{2} + a}}{48 \, a^{3} x^{6}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 5.58049, size = 117, normalized size = 1.23 \begin{align*} - \frac{a}{6 \sqrt{b} x^{7} \sqrt{\frac{a}{b x^{2}} + 1}} - \frac{5 \sqrt{b}}{24 x^{5} \sqrt{\frac{a}{b x^{2}} + 1}} + \frac{b^{\frac{3}{2}}}{48 a x^{3} \sqrt{\frac{a}{b x^{2}} + 1}} + \frac{b^{\frac{5}{2}}}{16 a^{2} x \sqrt{\frac{a}{b x^{2}} + 1}} - \frac{b^{3} \operatorname{asinh}{\left (\frac{\sqrt{a}}{\sqrt{b} x} \right )}}{16 a^{\frac{5}{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.84982, size = 108, normalized size = 1.14 \begin{align*} \frac{1}{48} \, b^{3}{\left (\frac{3 \, \arctan \left (\frac{\sqrt{b x^{2} + a}}{\sqrt{-a}}\right )}{\sqrt{-a} a^{2}} + \frac{3 \,{\left (b x^{2} + a\right )}^{\frac{5}{2}} - 8 \,{\left (b x^{2} + a\right )}^{\frac{3}{2}} a - 3 \, \sqrt{b x^{2} + a} a^{2}}{a^{2} b^{3} x^{6}}\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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