Integrand size = 14, antiderivative size = 15 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log ^2(a+b x)}{2 b} \]
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Time = 0.01 (sec) , antiderivative size = 15, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {2437, 2338} \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log ^2(a+b x)}{2 b} \]
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Rule 2338
Rule 2437
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {\log (x)}{x} \, dx,x,a+b x\right )}{b} \\ & = \frac {\log ^2(a+b x)}{2 b} \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 15, normalized size of antiderivative = 1.00 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log ^2(a+b x)}{2 b} \]
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Time = 0.81 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.93
method | result | size |
derivativedivides | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
default | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
norman | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
risch | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
parallelrisch | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
parts | \(\frac {\ln \left (b x +a \right )^{2}}{2 b}\) | \(14\) |
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none
Time = 0.32 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.87 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log \left (b x + a\right )^{2}}{2 \, b} \]
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Time = 0.05 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.67 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log {\left (a + b x \right )}^{2}}{2 b} \]
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none
Time = 0.19 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.87 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log \left (b x + a\right )^{2}}{2 \, b} \]
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none
Time = 0.30 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.87 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {\log \left (b x + a\right )^{2}}{2 \, b} \]
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Time = 1.64 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.87 \[ \int \frac {\log (a+b x)}{a+b x} \, dx=\frac {{\ln \left (a+b\,x\right )}^2}{2\,b} \]
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