Optimal. Leaf size=104 \[ \frac{3 a^2 B \tanh ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a+b x^2}}\right )}{8 b^{5/2}}-\frac{a \sqrt{a+b x^2} (16 A+9 B x)}{24 b^2}+\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b} \]
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Rubi [A] time = 0.0772985, antiderivative size = 104, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 4, integrand size = 20, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.2, Rules used = {833, 780, 217, 206} \[ \frac{3 a^2 B \tanh ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a+b x^2}}\right )}{8 b^{5/2}}-\frac{a \sqrt{a+b x^2} (16 A+9 B x)}{24 b^2}+\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b} \]
Antiderivative was successfully verified.
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Rule 833
Rule 780
Rule 217
Rule 206
Rubi steps
\begin{align*} \int \frac{x^3 (A+B x)}{\sqrt{a+b x^2}} \, dx &=\frac{B x^3 \sqrt{a+b x^2}}{4 b}+\frac{\int \frac{x^2 (-3 a B+4 A b x)}{\sqrt{a+b x^2}} \, dx}{4 b}\\ &=\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b}+\frac{\int \frac{x (-8 a A b-9 a b B x)}{\sqrt{a+b x^2}} \, dx}{12 b^2}\\ &=\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b}-\frac{a (16 A+9 B x) \sqrt{a+b x^2}}{24 b^2}+\frac{\left (3 a^2 B\right ) \int \frac{1}{\sqrt{a+b x^2}} \, dx}{8 b^2}\\ &=\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b}-\frac{a (16 A+9 B x) \sqrt{a+b x^2}}{24 b^2}+\frac{\left (3 a^2 B\right ) \operatorname{Subst}\left (\int \frac{1}{1-b x^2} \, dx,x,\frac{x}{\sqrt{a+b x^2}}\right )}{8 b^2}\\ &=\frac{A x^2 \sqrt{a+b x^2}}{3 b}+\frac{B x^3 \sqrt{a+b x^2}}{4 b}-\frac{a (16 A+9 B x) \sqrt{a+b x^2}}{24 b^2}+\frac{3 a^2 B \tanh ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a+b x^2}}\right )}{8 b^{5/2}}\\ \end{align*}
Mathematica [A] time = 0.0436885, size = 76, normalized size = 0.73 \[ \frac{9 a^2 B \tanh ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a+b x^2}}\right )+\sqrt{b} \sqrt{a+b x^2} \left (-16 a A-9 a B x+8 A b x^2+6 b B x^3\right )}{24 b^{5/2}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.007, size = 96, normalized size = 0.9 \begin{align*}{\frac{{x}^{3}B}{4\,b}\sqrt{b{x}^{2}+a}}-{\frac{3\,Bax}{8\,{b}^{2}}\sqrt{b{x}^{2}+a}}+{\frac{3\,B{a}^{2}}{8}\ln \left ( x\sqrt{b}+\sqrt{b{x}^{2}+a} \right ){b}^{-{\frac{5}{2}}}}+{\frac{A{x}^{2}}{3\,b}\sqrt{b{x}^{2}+a}}-{\frac{2\,Aa}{3\,{b}^{2}}\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 = 1.58804, size = 385, normalized size = 3.7 \begin{align*} \left [\frac{9 \, B a^{2} \sqrt{b} \log \left (-2 \, b x^{2} - 2 \, \sqrt{b x^{2} + a} \sqrt{b} x - a\right ) + 2 \,{\left (6 \, B b^{2} x^{3} + 8 \, A b^{2} x^{2} - 9 \, B a b x - 16 \, A a b\right )} \sqrt{b x^{2} + a}}{48 \, b^{3}}, -\frac{9 \, B a^{2} \sqrt{-b} \arctan \left (\frac{\sqrt{-b} x}{\sqrt{b x^{2} + a}}\right ) -{\left (6 \, B b^{2} x^{3} + 8 \, A b^{2} x^{2} - 9 \, B a b x - 16 \, A a b\right )} \sqrt{b x^{2} + a}}{24 \, b^{3}}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 5.28368, size = 150, normalized size = 1.44 \begin{align*} A \left (\begin{cases} - \frac{2 a \sqrt{a + b x^{2}}}{3 b^{2}} + \frac{x^{2} \sqrt{a + b x^{2}}}{3 b} & \text{for}\: b \neq 0 \\\frac{x^{4}}{4 \sqrt{a}} & \text{otherwise} \end{cases}\right ) - \frac{3 B a^{\frac{3}{2}} x}{8 b^{2} \sqrt{1 + \frac{b x^{2}}{a}}} - \frac{B \sqrt{a} x^{3}}{8 b \sqrt{1 + \frac{b x^{2}}{a}}} + \frac{3 B a^{2} \operatorname{asinh}{\left (\frac{\sqrt{b} x}{\sqrt{a}} \right )}}{8 b^{\frac{5}{2}}} + \frac{B x^{5}}{4 \sqrt{a} \sqrt{1 + \frac{b x^{2}}{a}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.23076, size = 100, normalized size = 0.96 \begin{align*} \frac{1}{24} \, \sqrt{b x^{2} + a}{\left ({\left (2 \,{\left (\frac{3 \, B x}{b} + \frac{4 \, A}{b}\right )} x - \frac{9 \, B a}{b^{2}}\right )} x - \frac{16 \, A a}{b^{2}}\right )} - \frac{3 \, B a^{2} \log \left ({\left | -\sqrt{b} x + \sqrt{b x^{2} + a} \right |}\right )}{8 \, b^{\frac{5}{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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