Optimal. Leaf size=29 \[ -\frac {i \sqrt {1+a^2 x^2}}{a}+\frac {\sinh ^{-1}(a x)}{a} \]
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Rubi [A]
time = 0.01, antiderivative size = 29, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {5167, 655, 221}
\begin {gather*} \frac {\sinh ^{-1}(a x)}{a}-\frac {i \sqrt {a^2 x^2+1}}{a} \end {gather*}
Antiderivative was successfully verified.
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Rule 221
Rule 655
Rule 5167
Rubi steps
\begin {align*} \int e^{-i \tan ^{-1}(a x)} \, dx &=\int \frac {1-i a x}{\sqrt {1+a^2 x^2}} \, dx\\ &=-\frac {i \sqrt {1+a^2 x^2}}{a}+\int \frac {1}{\sqrt {1+a^2 x^2}} \, dx\\ &=-\frac {i \sqrt {1+a^2 x^2}}{a}+\frac {\sinh ^{-1}(a x)}{a}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 26, normalized size = 0.90 \begin {gather*} \frac {-i \sqrt {1+a^2 x^2}+\sinh ^{-1}(a x)}{a} \end {gather*}
Antiderivative was successfully verified.
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Maple [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 99 vs. \(2 (26 ) = 52\).
time = 0.07, size = 100, normalized size = 3.45
method | result | size |
risch | \(-\frac {i \sqrt {a^{2} x^{2}+1}}{a}+\frac {\ln \left (\frac {a^{2} x}{\sqrt {a^{2}}}+\sqrt {a^{2} x^{2}+1}\right )}{\sqrt {a^{2}}}\) | \(48\) |
default | \(-\frac {i \left (\sqrt {\left (x -\frac {i}{a}\right )^{2} a^{2}+2 i a \left (x -\frac {i}{a}\right )}+\frac {i a \ln \left (\frac {i a +\left (x -\frac {i}{a}\right ) a^{2}}{\sqrt {a^{2}}}+\sqrt {\left (x -\frac {i}{a}\right )^{2} a^{2}+2 i a \left (x -\frac {i}{a}\right )}\right )}{\sqrt {a^{2}}}\right )}{a}\) | \(100\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.47, size = 25, normalized size = 0.86 \begin {gather*} \frac {\operatorname {arsinh}\left (a x\right )}{a} - \frac {i \, \sqrt {a^{2} x^{2} + 1}}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 2.26, size = 37, normalized size = 1.28 \begin {gather*} \frac {-i \, \sqrt {a^{2} x^{2} + 1} - \log \left (-a x + \sqrt {a^{2} x^{2} + 1}\right )}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} - i \int \frac {\sqrt {a^{2} x^{2} + 1}}{a x - i}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.41, size = 41, normalized size = 1.41 \begin {gather*} -\frac {\log \left (-x {\left | a \right |} + \sqrt {a^{2} x^{2} + 1}\right )}{{\left | a \right |}} - \frac {i \, \sqrt {a^{2} x^{2} + 1}}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.40, size = 32, normalized size = 1.10 \begin {gather*} \frac {\mathrm {asinh}\left (x\,\sqrt {a^2}\right )}{\sqrt {a^2}}-\frac {\sqrt {a^2\,x^2+1}\,1{}\mathrm {i}}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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