Optimal. Leaf size=80 \[ -\frac {1}{2 a x^2}-\frac {\sqrt {1-a x^2}}{2 a x^2 \sqrt {\frac {1}{1+a x^2}}}-\frac {1}{2} \sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2} \text {ArcSin}\left (a x^2\right ) \]
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Rubi [A]
time = 0.04, antiderivative size = 93, normalized size of antiderivative = 1.16, number of steps
used = 5, number of rules used = 5, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.417, Rules used = {6469, 265, 281,
283, 222} \begin {gather*} -\frac {\sqrt {\frac {1}{a x^2+1}} \sqrt {a x^2+1} \sqrt {1-a^2 x^4}}{2 a x^2}-\frac {1}{2} \sqrt {\frac {1}{a x^2+1}} \sqrt {a x^2+1} \text {ArcSin}\left (a x^2\right )-\frac {1}{2 a x^2} \end {gather*}
Warning: Unable to verify antiderivative.
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Rule 222
Rule 265
Rule 281
Rule 283
Rule 6469
Rubi steps
\begin {align*} \int \frac {e^{\text {sech}^{-1}\left (a x^2\right )}}{x} \, dx &=-\frac {1}{2 a x^2}+\frac {\left (\sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2}\right ) \int \frac {\sqrt {1-a x^2} \sqrt {1+a x^2}}{x^3} \, dx}{a}\\ &=-\frac {1}{2 a x^2}+\frac {\left (\sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2}\right ) \int \frac {\sqrt {1-a^2 x^4}}{x^3} \, dx}{a}\\ &=-\frac {1}{2 a x^2}+\frac {\left (\sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2}\right ) \text {Subst}\left (\int \frac {\sqrt {1-a^2 x^2}}{x^2} \, dx,x,x^2\right )}{2 a}\\ &=-\frac {1}{2 a x^2}-\frac {\sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2} \sqrt {1-a^2 x^4}}{2 a x^2}-\frac {1}{2} \left (a \sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2}\right ) \text {Subst}\left (\int \frac {1}{\sqrt {1-a^2 x^2}} \, dx,x,x^2\right )\\ &=-\frac {1}{2 a x^2}-\frac {\sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2} \sqrt {1-a^2 x^4}}{2 a x^2}-\frac {1}{2} \sqrt {\frac {1}{1+a x^2}} \sqrt {1+a x^2} \sin ^{-1}\left (a x^2\right )\\ \end {align*}
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Mathematica [A]
time = 0.10, size = 113, normalized size = 1.41 \begin {gather*} -\frac {1}{2 a x^2}+\left (-\frac {1}{2}-\frac {1}{2 a x^2}\right ) \sqrt {\frac {1-a x^2}{1+a x^2}}+\frac {\sqrt {\frac {1-a x^2}{1+a x^2}} \left (1+a x^2\right ) \tanh ^{-1}\left (\frac {a x^2}{\sqrt {-1+a^2 x^4}}\right )}{2 \sqrt {-1+a^2 x^4}} \end {gather*}
Warning: Unable to verify antiderivative.
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Maple [A]
time = 0.07, size = 103, normalized size = 1.29
method | result | size |
default | \(-\frac {\sqrt {-\frac {a \,x^{2}-1}{a \,x^{2}}}\, \sqrt {\frac {a \,x^{2}+1}{a \,x^{2}}}\, \left (\arctan \left (\frac {x^{2}}{\sqrt {-\frac {a^{2} x^{4}-1}{a^{2}}}}\right ) x^{2}+\sqrt {-\frac {a^{2} x^{4}-1}{a^{2}}}\right )}{2 \sqrt {-\frac {a^{2} x^{4}-1}{a^{2}}}}-\frac {1}{2 a \,x^{2}}\) | \(103\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 102 vs.
\(2 (44) = 88\).
time = 0.42, size = 102, normalized size = 1.28 \begin {gather*} -\frac {a x^{2} \sqrt {\frac {a x^{2} + 1}{a x^{2}}} \sqrt {-\frac {a x^{2} - 1}{a x^{2}}} - 2 \, a x^{2} \arctan \left (\frac {a x^{2} \sqrt {\frac {a x^{2} + 1}{a x^{2}}} \sqrt {-\frac {a x^{2} - 1}{a x^{2}}} - 1}{a x^{2}}\right ) + 1}{2 \, a x^{2}} \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*} \frac {\int \frac {1}{x^{3}}\, dx + \int \frac {a \sqrt {-1 + \frac {1}{a x^{2}}} \sqrt {1 + \frac {1}{a x^{2}}}}{x}\, dx}{a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 252 vs.
\(2 (44) = 88\).
time = 1.69, size = 252, normalized size = 3.15 \begin {gather*} -\frac {{\left (\pi + 2 \, \arctan \left (\frac {\sqrt {a^{2} x^{2} + a} {\left (\frac {{\left (\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}\right )}^{2}}{a^{2} x^{2} + a} - 1\right )}}{2 \, {\left (\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}\right )}}\right )\right )} a^{3} + \frac {4 \, a^{3} {\left (\frac {\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}}{\sqrt {a^{2} x^{2} + a}} - \frac {\sqrt {a^{2} x^{2} + a}}{\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}}\right )}}{{\left (\frac {\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}}{\sqrt {a^{2} x^{2} + a}} - \frac {\sqrt {a^{2} x^{2} + a}}{\sqrt {2} \sqrt {a} - \sqrt {-a^{2} x^{2} + a}}\right )}^{2} - 4} + \frac {a^{2}}{x^{2}}}{2 \, a^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 4.00, size = 185, normalized size = 2.31 \begin {gather*} -\frac {\ln \left (\frac {{\left (\sqrt {\frac {1}{a\,x^2}-1}-\mathrm {i}\right )}^2}{{\left (\sqrt {\frac {1}{a\,x^2}+1}-1\right )}^2}+1\right )\,1{}\mathrm {i}}{2}+\frac {\ln \left (\frac {\sqrt {\frac {1}{a\,x^2}-1}-\mathrm {i}}{\sqrt {\frac {1}{a\,x^2}+1}-1}\right )\,1{}\mathrm {i}}{2}-\frac {1}{2\,a\,x^2}+\frac {{\left (\sqrt {\frac {1}{a\,x^2}-1}-\mathrm {i}\right )}^2\,8{}\mathrm {i}}{{\left (\sqrt {\frac {1}{a\,x^2}+1}-1\right )}^2\,\left (2+\frac {2\,{\left (\sqrt {\frac {1}{a\,x^2}-1}-\mathrm {i}\right )}^4}{{\left (\sqrt {\frac {1}{a\,x^2}+1}-1\right )}^4}-\frac {4\,{\left (\sqrt {\frac {1}{a\,x^2}-1}-\mathrm {i}\right )}^2}{{\left (\sqrt {\frac {1}{a\,x^2}+1}-1\right )}^2}\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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