Optimal. Leaf size=55 \[ -\frac {c \left (1-a^2 x^2\right )^{3/2}}{3 a}+\frac {1}{2} c x \sqrt {1-a^2 x^2}+\frac {c \sin ^{-1}(a x)}{2 a} \]
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Rubi [A] time = 0.03, antiderivative size = 55, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 18, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.222, Rules used = {6138, 641, 195, 216} \[ -\frac {c \left (1-a^2 x^2\right )^{3/2}}{3 a}+\frac {1}{2} c x \sqrt {1-a^2 x^2}+\frac {c \sin ^{-1}(a x)}{2 a} \]
Antiderivative was successfully verified.
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Rule 195
Rule 216
Rule 641
Rule 6138
Rubi steps
\begin {align*} \int e^{\tanh ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx &=c \int (1+a x) \sqrt {1-a^2 x^2} \, dx\\ &=-\frac {c \left (1-a^2 x^2\right )^{3/2}}{3 a}+c \int \sqrt {1-a^2 x^2} \, dx\\ &=\frac {1}{2} c x \sqrt {1-a^2 x^2}-\frac {c \left (1-a^2 x^2\right )^{3/2}}{3 a}+\frac {1}{2} c \int \frac {1}{\sqrt {1-a^2 x^2}} \, dx\\ &=\frac {1}{2} c x \sqrt {1-a^2 x^2}-\frac {c \left (1-a^2 x^2\right )^{3/2}}{3 a}+\frac {c \sin ^{-1}(a x)}{2 a}\\ \end {align*}
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Mathematica [A] time = 0.07, size = 57, normalized size = 1.04 \[ \frac {c \left (\sqrt {1-a^2 x^2} \left (2 a^2 x^2+3 a x-2\right )-6 \sin ^{-1}\left (\frac {\sqrt {1-a x}}{\sqrt {2}}\right )\right )}{6 a} \]
Warning: Unable to verify antiderivative.
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fricas [A] time = 0.54, size = 63, normalized size = 1.15 \[ -\frac {6 \, c \arctan \left (\frac {\sqrt {-a^{2} x^{2} + 1} - 1}{a x}\right ) - {\left (2 \, a^{2} c x^{2} + 3 \, a c x - 2 \, c\right )} \sqrt {-a^{2} x^{2} + 1}}{6 \, a} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.21, size = 46, normalized size = 0.84 \[ \frac {c \arcsin \left (a x\right ) \mathrm {sgn}\relax (a)}{2 \, {\left | a \right |}} + \frac {1}{6} \, \sqrt {-a^{2} x^{2} + 1} {\left ({\left (2 \, a c x + 3 \, c\right )} x - \frac {2 \, c}{a}\right )} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.04, size = 83, normalized size = 1.51 \[ \frac {c a \,x^{2} \sqrt {-a^{2} x^{2}+1}}{3}-\frac {c \sqrt {-a^{2} x^{2}+1}}{3 a}+\frac {c x \sqrt {-a^{2} x^{2}+1}}{2}+\frac {c \arctan \left (\frac {\sqrt {a^{2}}\, x}{\sqrt {-a^{2} x^{2}+1}}\right )}{2 \sqrt {a^{2}}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.40, size = 64, normalized size = 1.16 \[ \frac {1}{3} \, \sqrt {-a^{2} x^{2} + 1} a c x^{2} + \frac {1}{2} \, \sqrt {-a^{2} x^{2} + 1} c x + \frac {c \arcsin \left (a x\right )}{2 \, a} - \frac {\sqrt {-a^{2} x^{2} + 1} c}{3 \, a} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.88, size = 80, normalized size = 1.45 \[ \frac {\sqrt {1-a^2\,x^2}\,\left (\frac {a\,c}{3\,\sqrt {-a^2}}+\frac {c\,x\,\sqrt {-a^2}}{2}-\frac {a^3\,c\,x^2}{3\,\sqrt {-a^2}}\right )}{\sqrt {-a^2}}+\frac {c\,\mathrm {asinh}\left (x\,\sqrt {-a^2}\right )}{2\,\sqrt {-a^2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 4.82, size = 53, normalized size = 0.96 \[ \begin {cases} \frac {- \frac {c \left (- a^{2} x^{2} + 1\right )^{\frac {3}{2}}}{3} + c \left (\begin {cases} \frac {a x \sqrt {- a^{2} x^{2} + 1}}{2} + \frac {\operatorname {asin}{\left (a x \right )}}{2} & \text {for}\: a x > -1 \wedge a x < 1 \end {cases}\right )}{a} & \text {for}\: a \neq 0 \\c x & \text {otherwise} \end {cases} \]
Verification of antiderivative is not currently implemented for this CAS.
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