Optimal. Leaf size=38 \[ -\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)+a \log (x)-a \log \left (1-a^2 x^2\right ) \]
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Rubi [A]
time = 0.04, antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps
used = 8, number of rules used = 8, integrand size = 18, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.444, Rules used = {6161, 6037,
272, 36, 29, 31, 6021, 266} \begin {gather*} -a \log \left (1-a^2 x^2\right )+a^2 (-x) \tanh ^{-1}(a x)+a \log (x)-\frac {\tanh ^{-1}(a x)}{x} \end {gather*}
Antiderivative was successfully verified.
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Rule 29
Rule 31
Rule 36
Rule 266
Rule 272
Rule 6021
Rule 6037
Rule 6161
Rubi steps
\begin {align*} \int \frac {\left (1-a^2 x^2\right ) \tanh ^{-1}(a x)}{x^2} \, dx &=-\left (a^2 \int \tanh ^{-1}(a x) \, dx\right )+\int \frac {\tanh ^{-1}(a x)}{x^2} \, dx\\ &=-\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)+a \int \frac {1}{x \left (1-a^2 x^2\right )} \, dx+a^3 \int \frac {x}{1-a^2 x^2} \, dx\\ &=-\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)-\frac {1}{2} a \log \left (1-a^2 x^2\right )+\frac {1}{2} a \text {Subst}\left (\int \frac {1}{x \left (1-a^2 x\right )} \, dx,x,x^2\right )\\ &=-\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)-\frac {1}{2} a \log \left (1-a^2 x^2\right )+\frac {1}{2} a \text {Subst}\left (\int \frac {1}{x} \, dx,x,x^2\right )+\frac {1}{2} a^3 \text {Subst}\left (\int \frac {1}{1-a^2 x} \, dx,x,x^2\right )\\ &=-\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)+a \log (x)-a \log \left (1-a^2 x^2\right )\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 38, normalized size = 1.00 \begin {gather*} -\frac {\tanh ^{-1}(a x)}{x}-a^2 x \tanh ^{-1}(a x)+a \log (x)-a \log \left (1-a^2 x^2\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.12, size = 44, normalized size = 1.16
method | result | size |
derivativedivides | \(a \left (-a x \arctanh \left (a x \right )-\frac {\arctanh \left (a x \right )}{a x}-\ln \left (a x -1\right )+\ln \left (a x \right )-\ln \left (a x +1\right )\right )\) | \(44\) |
default | \(a \left (-a x \arctanh \left (a x \right )-\frac {\arctanh \left (a x \right )}{a x}-\ln \left (a x -1\right )+\ln \left (a x \right )-\ln \left (a x +1\right )\right )\) | \(44\) |
risch | \(-\frac {\left (a^{2} x^{2}+1\right ) \ln \left (a x +1\right )}{2 x}+\frac {x^{2} \ln \left (-a x +1\right ) a^{2}+2 a \ln \left (x \right ) x -2 a \ln \left (a^{2} x^{2}-1\right ) x +\ln \left (-a x +1\right )}{2 x}\) | \(69\) |
meijerg | \(\frac {a \left (\frac {2 \ln \left (1-\sqrt {a^{2} x^{2}}\right )-2 \ln \left (1+\sqrt {a^{2} x^{2}}\right )}{\sqrt {a^{2} x^{2}}}-2 \ln \left (-a^{2} x^{2}+1\right )+4 \ln \left (x \right )+4 \ln \left (i a \right )\right )}{4}+\frac {a \left (\frac {2 a^{2} x^{2} \left (\ln \left (1-\sqrt {a^{2} x^{2}}\right )-\ln \left (1+\sqrt {a^{2} x^{2}}\right )\right )}{\sqrt {a^{2} x^{2}}}-2 \ln \left (-a^{2} x^{2}+1\right )\right )}{4}\) | \(133\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.26, size = 36, normalized size = 0.95 \begin {gather*} -a {\left (\log \left (a x + 1\right ) + \log \left (a x - 1\right ) - \log \left (x\right )\right )} - {\left (a^{2} x + \frac {1}{x}\right )} \operatorname {artanh}\left (a x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.37, size = 51, normalized size = 1.34 \begin {gather*} -\frac {2 \, a x \log \left (a^{2} x^{2} - 1\right ) - 2 \, a x \log \left (x\right ) + {\left (a^{2} x^{2} + 1\right )} \log \left (-\frac {a x + 1}{a x - 1}\right )}{2 \, x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.41, size = 41, normalized size = 1.08 \begin {gather*} \begin {cases} - a^{2} x \operatorname {atanh}{\left (a x \right )} + a \log {\left (x \right )} - 2 a \log {\left (x - \frac {1}{a} \right )} - 2 a \operatorname {atanh}{\left (a x \right )} - \frac {\operatorname {atanh}{\left (a x \right )}}{x} & \text {for}\: a \neq 0 \\0 & \text {otherwise} \end {cases} \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. 145 vs.
\(2 (38) = 76\).
time = 0.39, size = 145, normalized size = 3.82 \begin {gather*} -a {\left (\frac {2 \, \log \left (-\frac {\frac {a {\left (\frac {a x + 1}{a x - 1} + 1\right )}}{\frac {{\left (a x + 1\right )} a}{a x - 1} - a} + 1}{\frac {a {\left (\frac {a x + 1}{a x - 1} + 1\right )}}{\frac {{\left (a x + 1\right )} a}{a x - 1} - a} - 1}\right )}{\frac {{\left (a x + 1\right )}^{2}}{{\left (a x - 1\right )}^{2}} - 1} + \log \left (\frac {{\left (a x + 1\right )}^{2}}{{\left (a x - 1\right )}^{2}}\right ) - \log \left ({\left | \frac {{\left (a x + 1\right )}^{2}}{{\left (a x - 1\right )}^{2}} - 1 \right |}\right )\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.81, size = 37, normalized size = 0.97 \begin {gather*} a\,\ln \left (x\right )-a\,\ln \left (a^2\,x^2-1\right )-\frac {\mathrm {atanh}\left (a\,x\right )}{x}-a^2\,x\,\mathrm {atanh}\left (a\,x\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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