Integrand size = 8, antiderivative size = 55 \[ \int \log ^3(a+b x) \, dx=-6 x+\frac {6 (a+b x) \log (a+b x)}{b}-\frac {3 (a+b x) \log ^2(a+b x)}{b}+\frac {(a+b x) \log ^3(a+b x)}{b} \]
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Time = 0.01 (sec) , antiderivative size = 55, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.375, Rules used = {2436, 2333, 2332} \[ \int \log ^3(a+b x) \, dx=\frac {(a+b x) \log ^3(a+b x)}{b}-\frac {3 (a+b x) \log ^2(a+b x)}{b}+\frac {6 (a+b x) \log (a+b x)}{b}-6 x \]
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Rule 2332
Rule 2333
Rule 2436
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \log ^3(x) \, dx,x,a+b x\right )}{b} \\ & = \frac {(a+b x) \log ^3(a+b x)}{b}-\frac {3 \text {Subst}\left (\int \log ^2(x) \, dx,x,a+b x\right )}{b} \\ & = -\frac {3 (a+b x) \log ^2(a+b x)}{b}+\frac {(a+b x) \log ^3(a+b x)}{b}+\frac {6 \text {Subst}(\int \log (x) \, dx,x,a+b x)}{b} \\ & = -6 x+\frac {6 (a+b x) \log (a+b x)}{b}-\frac {3 (a+b x) \log ^2(a+b x)}{b}+\frac {(a+b x) \log ^3(a+b x)}{b} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 51, normalized size of antiderivative = 0.93 \[ \int \log ^3(a+b x) \, dx=\frac {-6 b x+6 (a+b x) \log (a+b x)-3 (a+b x) \log ^2(a+b x)+(a+b x) \log ^3(a+b x)}{b} \]
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Time = 0.12 (sec) , antiderivative size = 55, normalized size of antiderivative = 1.00
method | result | size |
derivativedivides | \(\frac {\ln \left (b x +a \right )^{3} \left (b x +a \right )-3 \ln \left (b x +a \right )^{2} \left (b x +a \right )+6 \left (b x +a \right ) \ln \left (b x +a \right )-6 b x -6 a}{b}\) | \(55\) |
default | \(\frac {\ln \left (b x +a \right )^{3} \left (b x +a \right )-3 \ln \left (b x +a \right )^{2} \left (b x +a \right )+6 \left (b x +a \right ) \ln \left (b x +a \right )-6 b x -6 a}{b}\) | \(55\) |
risch | \(\frac {\left (b x +a \right ) \ln \left (b x +a \right )^{3}}{b}-\frac {3 \left (b x +a \right ) \ln \left (b x +a \right )^{2}}{b}+6 x \ln \left (b x +a \right )-6 x +\frac {6 a \ln \left (b x +a \right )}{b}\) | \(61\) |
norman | \(x \ln \left (b x +a \right )^{3}+\frac {a \ln \left (b x +a \right )^{3}}{b}-6 x +6 x \ln \left (b x +a \right )-3 x \ln \left (b x +a \right )^{2}+\frac {6 a \ln \left (b x +a \right )}{b}-\frac {3 a \ln \left (b x +a \right )^{2}}{b}\) | \(74\) |
parallelrisch | \(\frac {x \ln \left (b x +a \right )^{3} b -3 x \ln \left (b x +a \right )^{2} b +\ln \left (b x +a \right )^{3} a +6 \ln \left (b x +a \right ) x b -3 \ln \left (b x +a \right )^{2} a -6 b x +6 a \ln \left (b x +a \right )+6 a}{b}\) | \(76\) |
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Time = 0.27 (sec) , antiderivative size = 51, normalized size of antiderivative = 0.93 \[ \int \log ^3(a+b x) \, dx=\frac {{\left (b x + a\right )} \log \left (b x + a\right )^{3} - 3 \, {\left (b x + a\right )} \log \left (b x + a\right )^{2} - 6 \, b x + 6 \, {\left (b x + a\right )} \log \left (b x + a\right )}{b} \]
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Time = 0.10 (sec) , antiderivative size = 63, normalized size of antiderivative = 1.15 \[ \int \log ^3(a+b x) \, dx=- 6 b \left (- \frac {a \log {\left (a + b x \right )}}{b^{2}} + \frac {x}{b}\right ) + 6 x \log {\left (a + b x \right )} + \frac {\left (- 3 a - 3 b x\right ) \log {\left (a + b x \right )}^{2}}{b} + \frac {\left (a + b x\right ) \log {\left (a + b x \right )}^{3}}{b} \]
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Time = 0.19 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.67 \[ \int \log ^3(a+b x) \, dx=\frac {{\left (\log \left (b x + a\right )^{3} - 3 \, \log \left (b x + a\right )^{2} + 6 \, \log \left (b x + a\right ) - 6\right )} {\left (b x + a\right )}}{b} \]
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Time = 0.33 (sec) , antiderivative size = 62, normalized size of antiderivative = 1.13 \[ \int \log ^3(a+b x) \, dx=\frac {{\left (b x + a\right )} \log \left (b x + a\right )^{3}}{b} - \frac {3 \, {\left (b x + a\right )} \log \left (b x + a\right )^{2}}{b} + \frac {6 \, {\left (b x + a\right )} \log \left (b x + a\right )}{b} - \frac {6 \, {\left (b x + a\right )}}{b} \]
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Time = 1.42 (sec) , antiderivative size = 73, normalized size of antiderivative = 1.33 \[ \int \log ^3(a+b x) \, dx=6\,x\,\ln \left (a+b\,x\right )-6\,x-3\,x\,{\ln \left (a+b\,x\right )}^2+x\,{\ln \left (a+b\,x\right )}^3-\frac {3\,a\,{\ln \left (a+b\,x\right )}^2}{b}+\frac {a\,{\ln \left (a+b\,x\right )}^3}{b}+\frac {6\,a\,\ln \left (a+b\,x\right )}{b} \]
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