Optimal. Leaf size=84 \[ \frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{(5-3 a x) \sqrt{c-a^2 c x^2}}{3 a^2}+\frac{\sqrt{c} \tan ^{-1}\left (\frac{a \sqrt{c} x}{\sqrt{c-a^2 c x^2}}\right )}{a^2} \]
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Rubi [A] time = 0.25367, antiderivative size = 84, normalized size of antiderivative = 1., number of steps used = 6, number of rules used = 6, integrand size = 25, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.24, Rules used = {6167, 6152, 1809, 780, 217, 203} \[ \frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{(5-3 a x) \sqrt{c-a^2 c x^2}}{3 a^2}+\frac{\sqrt{c} \tan ^{-1}\left (\frac{a \sqrt{c} x}{\sqrt{c-a^2 c x^2}}\right )}{a^2} \]
Antiderivative was successfully verified.
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Rule 6167
Rule 6152
Rule 1809
Rule 780
Rule 217
Rule 203
Rubi steps
\begin{align*} \int e^{-2 \coth ^{-1}(a x)} x \sqrt{c-a^2 c x^2} \, dx &=-\int e^{-2 \tanh ^{-1}(a x)} x \sqrt{c-a^2 c x^2} \, dx\\ &=-\left (c \int \frac{x (1-a x)^2}{\sqrt{c-a^2 c x^2}} \, dx\right )\\ &=\frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{\int \frac{x \left (-5 a^2 c+6 a^3 c x\right )}{\sqrt{c-a^2 c x^2}} \, dx}{3 a^2}\\ &=\frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{(5-3 a x) \sqrt{c-a^2 c x^2}}{3 a^2}+\frac{c \int \frac{1}{\sqrt{c-a^2 c x^2}} \, dx}{a}\\ &=\frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{(5-3 a x) \sqrt{c-a^2 c x^2}}{3 a^2}+\frac{c \operatorname{Subst}\left (\int \frac{1}{1+a^2 c x^2} \, dx,x,\frac{x}{\sqrt{c-a^2 c x^2}}\right )}{a}\\ &=\frac{1}{3} x^2 \sqrt{c-a^2 c x^2}+\frac{(5-3 a x) \sqrt{c-a^2 c x^2}}{3 a^2}+\frac{\sqrt{c} \tan ^{-1}\left (\frac{a \sqrt{c} x}{\sqrt{c-a^2 c x^2}}\right )}{a^2}\\ \end{align*}
Mathematica [A] time = 0.0833393, size = 79, normalized size = 0.94 \[ \frac{\left (a^2 x^2-3 a x+5\right ) \sqrt{c-a^2 c x^2}-3 \sqrt{c} \tan ^{-1}\left (\frac{a x \sqrt{c-a^2 c x^2}}{\sqrt{c} \left (a^2 x^2-1\right )}\right )}{3 a^2} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.048, size = 156, normalized size = 1.9 \begin{align*} -{\frac{1}{3\,{a}^{2}c} \left ( -{a}^{2}c{x}^{2}+c \right ) ^{{\frac{3}{2}}}}-{\frac{x}{a}\sqrt{-{a}^{2}c{x}^{2}+c}}-{\frac{c}{a}\arctan \left ({x\sqrt{{a}^{2}c}{\frac{1}{\sqrt{-{a}^{2}c{x}^{2}+c}}}} \right ){\frac{1}{\sqrt{{a}^{2}c}}}}+2\,{\frac{\sqrt{-{a}^{2}c \left ( x+{a}^{-1} \right ) ^{2}+2\, \left ( x+{a}^{-1} \right ) ac}}{{a}^{2}}}+2\,{\frac{c}{a\sqrt{{a}^{2}c}}\arctan \left ({\frac{\sqrt{{a}^{2}c}x}{\sqrt{-{a}^{2}c \left ( x+{a}^{-1} \right ) ^{2}+2\, \left ( x+{a}^{-1} \right ) ac}}} \right ) } \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 = 1.73737, size = 344, normalized size = 4.1 \begin{align*} \left [\frac{2 \, \sqrt{-a^{2} c x^{2} + c}{\left (a^{2} x^{2} - 3 \, a x + 5\right )} + 3 \, \sqrt{-c} \log \left (2 \, a^{2} c x^{2} + 2 \, \sqrt{-a^{2} c x^{2} + c} a \sqrt{-c} x - c\right )}{6 \, a^{2}}, \frac{\sqrt{-a^{2} c x^{2} + c}{\left (a^{2} x^{2} - 3 \, a x + 5\right )} - 3 \, \sqrt{c} \arctan \left (\frac{\sqrt{-a^{2} c x^{2} + c} a \sqrt{c} x}{a^{2} c x^{2} - c}\right )}{3 \, a^{2}}\right ] \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{x \sqrt{- c \left (a x - 1\right ) \left (a x + 1\right )} \left (a x - 1\right )}{a x + 1}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.17287, size = 99, normalized size = 1.18 \begin{align*} \frac{1}{3} \, \sqrt{-a^{2} c x^{2} + c}{\left ({\left (x - \frac{3}{a}\right )} x + \frac{5}{a^{2}}\right )} - \frac{c \log \left ({\left | -\sqrt{-a^{2} c} x + \sqrt{-a^{2} c x^{2} + c} \right |}\right )}{a \sqrt{-c}{\left | a \right |}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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