Optimal. Leaf size=35 \[ -\text {Li}_2\left (\frac {a}{b x}+1\right )-\log \left (\frac {a}{x}+b\right ) \log \left (-\frac {a}{b x}\right ) \]
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Rubi [A] time = 0.06, antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.286, Rules used = {2461, 2454, 2394, 2315} \[ -\text {PolyLog}\left (2,\frac {a}{b x}+1\right )-\log \left (\frac {a}{x}+b\right ) \log \left (-\frac {a}{b x}\right ) \]
Antiderivative was successfully verified.
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Rule 2315
Rule 2394
Rule 2454
Rule 2461
Rubi steps
\begin {align*} \int \frac {\log \left (\frac {a+b x}{x}\right )}{x} \, dx &=\int \frac {\log \left (b+\frac {a}{x}\right )}{x} \, dx\\ &=-\operatorname {Subst}\left (\int \frac {\log (b+a x)}{x} \, dx,x,\frac {1}{x}\right )\\ &=-\log \left (b+\frac {a}{x}\right ) \log \left (-\frac {a}{b x}\right )+a \operatorname {Subst}\left (\int \frac {\log \left (-\frac {a x}{b}\right )}{b+a x} \, dx,x,\frac {1}{x}\right )\\ &=-\log \left (b+\frac {a}{x}\right ) \log \left (-\frac {a}{b x}\right )-\text {Li}_2\left (1+\frac {a}{b x}\right )\\ \end {align*}
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Mathematica [A] time = 0.00, size = 36, normalized size = 1.03 \[ -\text {Li}_2\left (\frac {\frac {a}{x}+b}{b}\right )-\log \left (\frac {a}{x}+b\right ) \log \left (-\frac {a}{b x}\right ) \]
Antiderivative was successfully verified.
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fricas [F] time = 0.43, size = 0, normalized size = 0.00 \[ {\rm integral}\left (\frac {\log \left (\frac {b x + a}{x}\right )}{x}, x\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [B] time = 0.66, size = 204, normalized size = 5.83 \[ \frac {a^{3} {\left (\frac {\log \left (\frac {{\left | b x + a \right |}}{{\left | x \right |}}\right )}{b^{2}} - \frac {\log \left ({\left | -b + \frac {b x + a}{x} \right |}\right )}{b^{2}} + \frac {1}{{\left (b - \frac {b x + a}{x}\right )} b}\right )} - \frac {a^{3} \log \left (-{\left (a - \frac {b}{\frac {{\left (a - \frac {b}{\frac {b}{a} - \frac {b x + a}{a x}}\right )} {\left (\frac {b}{a} - \frac {b x + a}{a x}\right )}}{a} + \frac {b}{a}}\right )} {\left (\frac {{\left (a - \frac {b}{\frac {b}{a} - \frac {b x + a}{a x}}\right )} {\left (\frac {b}{a} - \frac {b x + a}{a x}\right )}}{a} + \frac {b}{a}\right )}\right )}{{\left (b - \frac {b x + a}{x}\right )}^{2}}}{2 \, a^{2}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.08, size = 34, normalized size = 0.97 \[ -\ln \left (-\frac {a}{b x}\right ) \ln \left (b +\frac {a}{x}\right )-\dilog \left (-\frac {a}{b x}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.48, size = 67, normalized size = 1.91 \[ -{\left (\log \left (b x + a\right ) - \log \relax (x)\right )} \log \relax (x) + \log \left (b x + a\right ) \log \relax (x) - \log \left (\frac {b x}{a} + 1\right ) \log \relax (x) - \frac {1}{2} \, \log \relax (x)^{2} + \log \relax (x) \log \left (\frac {b x + a}{x}\right ) - {\rm Li}_2\left (-\frac {b x}{a}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.41, size = 37, normalized size = 1.06 \[ -\mathrm {polylog}\left (2,\frac {a}{b\,x}+1\right )-\ln \left (\frac {a+b\,x}{x}\right )\,\ln \left (-\frac {a}{b\,x}\right ) \]
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 \[ \int \frac {\log {\left (\frac {a}{x} + b \right )}}{x}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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