Optimal. Leaf size=51 \[ \frac {4 i \sqrt {1+a^2 x^2}}{i+a x}-i \sinh ^{-1}(a x)-\tanh ^{-1}\left (\sqrt {1+a^2 x^2}\right ) \]
[Out]
________________________________________________________________________________________
Rubi [A]
time = 0.55, antiderivative size = 51, normalized size of antiderivative = 1.00, number of steps
used = 8, number of rules used = 7, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5168, 6874,
221, 272, 65, 214, 665} \begin {gather*} \frac {4 i \sqrt {a^2 x^2+1}}{a x+i}-\tanh ^{-1}\left (\sqrt {a^2 x^2+1}\right )-i \sinh ^{-1}(a x) \end {gather*}
Antiderivative was successfully verified.
[In]
[Out]
Rule 65
Rule 214
Rule 221
Rule 272
Rule 665
Rule 5168
Rule 6874
Rubi steps
\begin {align*} \int \frac {e^{3 i \tan ^{-1}(a x)}}{x} \, dx &=\int \frac {(1+i a x)^2}{x (1-i a x) \sqrt {1+a^2 x^2}} \, dx\\ &=\int \left (-\frac {i a}{\sqrt {1+a^2 x^2}}+\frac {1}{x \sqrt {1+a^2 x^2}}-\frac {4 a}{(i+a x) \sqrt {1+a^2 x^2}}\right ) \, dx\\ &=-\left ((i a) \int \frac {1}{\sqrt {1+a^2 x^2}} \, dx\right )-(4 a) \int \frac {1}{(i+a x) \sqrt {1+a^2 x^2}} \, dx+\int \frac {1}{x \sqrt {1+a^2 x^2}} \, dx\\ &=\frac {4 i \sqrt {1+a^2 x^2}}{i+a x}-i \sinh ^{-1}(a x)+\frac {1}{2} \text {Subst}\left (\int \frac {1}{x \sqrt {1+a^2 x}} \, dx,x,x^2\right )\\ &=\frac {4 i \sqrt {1+a^2 x^2}}{i+a x}-i \sinh ^{-1}(a x)+\frac {\text {Subst}\left (\int \frac {1}{-\frac {1}{a^2}+\frac {x^2}{a^2}} \, dx,x,\sqrt {1+a^2 x^2}\right )}{a^2}\\ &=\frac {4 i \sqrt {1+a^2 x^2}}{i+a x}-i \sinh ^{-1}(a x)-\tanh ^{-1}\left (\sqrt {1+a^2 x^2}\right )\\ \end {align*}
________________________________________________________________________________________
Mathematica [A]
time = 0.03, size = 55, normalized size = 1.08 \begin {gather*} \frac {4 i \sqrt {1+a^2 x^2}}{i+a x}-i \sinh ^{-1}(a x)+\log (x)-\log \left (1+\sqrt {1+a^2 x^2}\right ) \end {gather*}
Warning: Unable to verify antiderivative.
[In]
[Out]
________________________________________________________________________________________
Maple [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 100 vs. \(2 (44 ) = 88\).
time = 0.08, size = 101, normalized size = 1.98
method | result | size |
default | \(-i a^{3} \left (-\frac {x}{a^{2} \sqrt {a^{2} x^{2}+1}}+\frac {\ln \left (\frac {a^{2} x}{\sqrt {a^{2}}}+\sqrt {a^{2} x^{2}+1}\right )}{a^{2} \sqrt {a^{2}}}\right )+\frac {4}{\sqrt {a^{2} x^{2}+1}}+\frac {3 i a x}{\sqrt {a^{2} x^{2}+1}}-\arctanh \left (\frac {1}{\sqrt {a^{2} x^{2}+1}}\right )\) | \(101\) |
meijerg | \(\frac {-\sqrt {\pi }+\frac {\sqrt {\pi }}{\sqrt {a^{2} x^{2}+1}}-\sqrt {\pi }\, \ln \left (\frac {1}{2}+\frac {\sqrt {a^{2} x^{2}+1}}{2}\right )+\frac {\left (2-2 \ln \left (2\right )+2 \ln \left (x \right )+\ln \left (a^{2}\right )\right ) \sqrt {\pi }}{2}}{\sqrt {\pi }}+\frac {3 i a x}{\sqrt {a^{2} x^{2}+1}}-\frac {3 \left (\sqrt {\pi }-\frac {\sqrt {\pi }}{\sqrt {a^{2} x^{2}+1}}\right )}{\sqrt {\pi }}-\frac {i a \left (-\frac {\sqrt {\pi }\, x \left (a^{2}\right )^{\frac {3}{2}}}{a^{2} \sqrt {a^{2} x^{2}+1}}+\frac {\sqrt {\pi }\, \left (a^{2}\right )^{\frac {3}{2}} \arcsinh \left (a x \right )}{a^{3}}\right )}{\sqrt {\pi }\, \sqrt {a^{2}}}\) | \(162\) |
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Maxima [A]
time = 0.30, size = 46, normalized size = 0.90 \begin {gather*} \frac {4 i \, a x}{\sqrt {a^{2} x^{2} + 1}} + \frac {4}{\sqrt {a^{2} x^{2} + 1}} - i \, \operatorname {arsinh}\left (a x\right ) - \operatorname {arsinh}\left (\frac {1}{a {\left | x \right |}}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Fricas [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 100 vs. \(2 (41) = 82\).
time = 2.17, size = 100, normalized size = 1.96 \begin {gather*} \frac {4 i \, a x - {\left (a x + i\right )} \log \left (-a x + \sqrt {a^{2} x^{2} + 1} + 1\right ) + {\left (i \, a x - 1\right )} \log \left (-a x + \sqrt {a^{2} x^{2} + 1}\right ) + {\left (a x + i\right )} \log \left (-a x + \sqrt {a^{2} x^{2} + 1} - 1\right ) + 4 i \, \sqrt {a^{2} x^{2} + 1} - 4}{a x + i} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} - i \left (\int \frac {i}{a^{2} x^{3} \sqrt {a^{2} x^{2} + 1} + x \sqrt {a^{2} x^{2} + 1}}\, dx + \int \left (- \frac {3 a x}{a^{2} x^{3} \sqrt {a^{2} x^{2} + 1} + x \sqrt {a^{2} x^{2} + 1}}\right )\, dx + \int \frac {a^{3} x^{3}}{a^{2} x^{3} \sqrt {a^{2} x^{2} + 1} + x \sqrt {a^{2} x^{2} + 1}}\, dx + \int \left (- \frac {3 i a^{2} x^{2}}{a^{2} x^{3} \sqrt {a^{2} x^{2} + 1} + x \sqrt {a^{2} x^{2} + 1}}\right )\, dx\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Mupad [B]
time = 0.43, size = 73, normalized size = 1.43 \begin {gather*} -\mathrm {atanh}\left (\sqrt {a^2\,x^2+1}\right )-\frac {a\,\mathrm {asinh}\left (x\,\sqrt {a^2}\right )\,1{}\mathrm {i}}{\sqrt {a^2}}+\frac {a\,\sqrt {a^2\,x^2+1}\,4{}\mathrm {i}}{\left (x\,\sqrt {a^2}+\frac {\sqrt {a^2}\,1{}\mathrm {i}}{a}\right )\,\sqrt {a^2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________