Optimal. Leaf size=76 \[ \frac{1}{2} a x \sqrt{a^2-b^2 x^2}+\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+\frac{a^3 \tan ^{-1}\left (\frac{b x}{\sqrt{a^2-b^2 x^2}}\right )}{2 b} \]
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Rubi [A] time = 0.0221436, antiderivative size = 76, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.167, Rules used = {665, 195, 217, 203} \[ \frac{1}{2} a x \sqrt{a^2-b^2 x^2}+\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+\frac{a^3 \tan ^{-1}\left (\frac{b x}{\sqrt{a^2-b^2 x^2}}\right )}{2 b} \]
Antiderivative was successfully verified.
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Rule 665
Rule 195
Rule 217
Rule 203
Rubi steps
\begin{align*} \int \frac{\left (a^2-b^2 x^2\right )^{3/2}}{a+b x} \, dx &=\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+a \int \sqrt{a^2-b^2 x^2} \, dx\\ &=\frac{1}{2} a x \sqrt{a^2-b^2 x^2}+\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+\frac{1}{2} a^3 \int \frac{1}{\sqrt{a^2-b^2 x^2}} \, dx\\ &=\frac{1}{2} a x \sqrt{a^2-b^2 x^2}+\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+\frac{1}{2} a^3 \operatorname{Subst}\left (\int \frac{1}{1+b^2 x^2} \, dx,x,\frac{x}{\sqrt{a^2-b^2 x^2}}\right )\\ &=\frac{1}{2} a x \sqrt{a^2-b^2 x^2}+\frac{\left (a^2-b^2 x^2\right )^{3/2}}{3 b}+\frac{a^3 \tan ^{-1}\left (\frac{b x}{\sqrt{a^2-b^2 x^2}}\right )}{2 b}\\ \end{align*}
Mathematica [A] time = 0.0784287, size = 90, normalized size = 1.18 \[ \frac{\sqrt{a^2-b^2 x^2} \left (\left (2 a^2+3 a b x-2 b^2 x^2\right ) \sqrt{1-\frac{b^2 x^2}{a^2}}+3 a^2 \sin ^{-1}\left (\frac{b x}{a}\right )\right )}{6 b \sqrt{1-\frac{b^2 x^2}{a^2}}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.047, size = 113, normalized size = 1.5 \begin{align*}{\frac{1}{3\,b} \left ( - \left ( x+{\frac{a}{b}} \right ) ^{2}{b}^{2}+2\, \left ( x+{\frac{a}{b}} \right ) ab \right ) ^{{\frac{3}{2}}}}+{\frac{ax}{2}\sqrt{- \left ( x+{\frac{a}{b}} \right ) ^{2}{b}^{2}+2\, \left ( x+{\frac{a}{b}} \right ) ab}}+{\frac{{a}^{3}}{2}\arctan \left ({x\sqrt{{b}^{2}}{\frac{1}{\sqrt{- \left ( x+{\frac{a}{b}} \right ) ^{2}{b}^{2}+2\, \left ( x+{\frac{a}{b}} \right ) ab}}}} \right ){\frac{1}{\sqrt{{b}^{2}}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [C] time = 1.73481, size = 119, normalized size = 1.57 \begin{align*} -\frac{i \, a^{3} \arcsin \left (\frac{b x}{a} + 2\right )}{2 \, b} + \frac{1}{2} \, \sqrt{b^{2} x^{2} + 4 \, a b x + 3 \, a^{2}} a x + \frac{\sqrt{b^{2} x^{2} + 4 \, a b x + 3 \, a^{2}} a^{2}}{b} + \frac{{\left (-b^{2} x^{2} + a^{2}\right )}^{\frac{3}{2}}}{3 \, b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.01181, size = 150, normalized size = 1.97 \begin{align*} -\frac{6 \, a^{3} \arctan \left (-\frac{a - \sqrt{-b^{2} x^{2} + a^{2}}}{b x}\right ) +{\left (2 \, b^{2} x^{2} - 3 \, a b x - 2 \, a^{2}\right )} \sqrt{-b^{2} x^{2} + a^{2}}}{6 \, b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 4.00543, size = 146, normalized size = 1.92 \begin{align*} a \left (\begin{cases} - \frac{i a^{2} \operatorname{acosh}{\left (\frac{b x}{a} \right )}}{2 b} - \frac{i a x}{2 \sqrt{-1 + \frac{b^{2} x^{2}}{a^{2}}}} + \frac{i b^{2} x^{3}}{2 a \sqrt{-1 + \frac{b^{2} x^{2}}{a^{2}}}} & \text{for}\: \frac{\left |{b^{2} x^{2}}\right |}{\left |{a^{2}}\right |} > 1 \\\frac{a^{2} \operatorname{asin}{\left (\frac{b x}{a} \right )}}{2 b} + \frac{a x \sqrt{1 - \frac{b^{2} x^{2}}{a^{2}}}}{2} & \text{otherwise} \end{cases}\right ) - b \left (\begin{cases} \frac{x^{2} \sqrt{a^{2}}}{2} & \text{for}\: b^{2} = 0 \\- \frac{\left (a^{2} - b^{2} x^{2}\right )^{\frac{3}{2}}}{3 b^{2}} & \text{otherwise} \end{cases}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.23443, size = 76, normalized size = 1. \begin{align*} \frac{a^{3} \arcsin \left (\frac{b x}{a}\right ) \mathrm{sgn}\left (a\right ) \mathrm{sgn}\left (b\right )}{2 \,{\left | b \right |}} - \frac{1}{6} \, \sqrt{-b^{2} x^{2} + a^{2}}{\left ({\left (2 \, b x - 3 \, a\right )} x - \frac{2 \, a^{2}}{b}\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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