Optimal. Leaf size=97 \[ -\frac{\left (\frac{1}{5}-\frac{3 i}{5}\right ) 2^{\frac{1}{2}+\frac{i}{2}} (1-i a x)^{\frac{3}{2}-\frac{i}{2}} \sqrt{a^2 c x^2+c} \, _2F_1\left (-\frac{1}{2}-\frac{i}{2},\frac{3}{2}-\frac{i}{2};\frac{5}{2}-\frac{i}{2};\frac{1}{2} (1-i a x)\right )}{a \sqrt{a^2 x^2+1}} \]
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Rubi [A] time = 0.0705675, antiderivative size = 97, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 23, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.13, Rules used = {5076, 5073, 69} \[ -\frac{\left (\frac{1}{5}-\frac{3 i}{5}\right ) 2^{\frac{1}{2}+\frac{i}{2}} (1-i a x)^{\frac{3}{2}-\frac{i}{2}} \sqrt{a^2 c x^2+c} \, _2F_1\left (-\frac{1}{2}-\frac{i}{2},\frac{3}{2}-\frac{i}{2};\frac{5}{2}-\frac{i}{2};\frac{1}{2} (1-i a x)\right )}{a \sqrt{a^2 x^2+1}} \]
Antiderivative was successfully verified.
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Rule 5076
Rule 5073
Rule 69
Rubi steps
\begin{align*} \int e^{-\tan ^{-1}(a x)} \sqrt{c+a^2 c x^2} \, dx &=\frac{\sqrt{c+a^2 c x^2} \int e^{-\tan ^{-1}(a x)} \sqrt{1+a^2 x^2} \, dx}{\sqrt{1+a^2 x^2}}\\ &=\frac{\sqrt{c+a^2 c x^2} \int (1-i a x)^{\frac{1}{2}-\frac{i}{2}} (1+i a x)^{\frac{1}{2}+\frac{i}{2}} \, dx}{\sqrt{1+a^2 x^2}}\\ &=-\frac{\left (\frac{1}{5}-\frac{3 i}{5}\right ) 2^{\frac{1}{2}+\frac{i}{2}} (1-i a x)^{\frac{3}{2}-\frac{i}{2}} \sqrt{c+a^2 c x^2} \, _2F_1\left (-\frac{1}{2}-\frac{i}{2},\frac{3}{2}-\frac{i}{2};\frac{5}{2}-\frac{i}{2};\frac{1}{2} (1-i a x)\right )}{a \sqrt{1+a^2 x^2}}\\ \end{align*}
Mathematica [A] time = 0.0180481, size = 97, normalized size = 1. \[ -\frac{\left (\frac{1}{5}-\frac{3 i}{5}\right ) 2^{\frac{1}{2}+\frac{i}{2}} (1-i a x)^{\frac{3}{2}-\frac{i}{2}} \sqrt{a^2 c x^2+c} \, _2F_1\left (-\frac{1}{2}-\frac{i}{2},\frac{3}{2}-\frac{i}{2};\frac{5}{2}-\frac{i}{2};\frac{1}{2} (1-i a x)\right )}{a \sqrt{a^2 x^2+1}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.288, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{{{\rm e}^{\arctan \left ( ax \right ) }}}\sqrt{{a}^{2}c{x}^{2}+c}}\, 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 \sqrt{a^{2} c x^{2} + c} e^{\left (-\arctan \left (a x\right )\right )}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (\sqrt{a^{2} c x^{2} + c} e^{\left (-\arctan \left (a x\right )\right )}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: TypeError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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