Integrand size = 12, antiderivative size = 35 \[ \int (a+b x) \log (a+b x) \, dx=-\frac {(a+b x)^2}{4 b}+\frac {(a+b x)^2 \log (a+b x)}{2 b} \]
[Out]
Time = 0.01 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {2437, 2341} \[ \int (a+b x) \log (a+b x) \, dx=\frac {(a+b x)^2 \log (a+b x)}{2 b}-\frac {(a+b x)^2}{4 b} \]
[In]
[Out]
Rule 2341
Rule 2437
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}(\int x \log (x) \, dx,x,a+b x)}{b} \\ & = -\frac {(a+b x)^2}{4 b}+\frac {(a+b x)^2 \log (a+b x)}{2 b} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.94 \[ \int (a+b x) \log (a+b x) \, dx=-\frac {1}{4} x (2 a+b x)+\frac {(a+b x)^2 \log (a+b x)}{2 b} \]
[In]
[Out]
Time = 0.20 (sec) , antiderivative size = 30, normalized size of antiderivative = 0.86
method | result | size |
derivativedivides | \(\frac {\frac {\left (b x +a \right )^{2} \ln \left (b x +a \right )}{2}-\frac {\left (b x +a \right )^{2}}{4}}{b}\) | \(30\) |
default | \(\frac {\frac {\left (b x +a \right )^{2} \ln \left (b x +a \right )}{2}-\frac {\left (b x +a \right )^{2}}{4}}{b}\) | \(30\) |
risch | \(\left (\frac {1}{2} b \,x^{2}+a x \right ) \ln \left (b x +a \right )-\frac {b \,x^{2}}{4}-\frac {a x}{2}+\frac {a^{2} \ln \left (b x +a \right )}{2 b}\) | \(43\) |
norman | \(a x \ln \left (b x +a \right )-\frac {a x}{2}-\frac {b \,x^{2}}{4}+\frac {a^{2} \ln \left (b x +a \right )}{2 b}+\frac {b \,x^{2} \ln \left (b x +a \right )}{2}\) | \(47\) |
parts | \(\frac {b \,x^{2} \ln \left (b x +a \right )}{2}+a x \ln \left (b x +a \right )-\frac {b \left (\frac {\frac {1}{2} b \,x^{2}+a x}{b}-\frac {a^{2} \ln \left (b x +a \right )}{b^{2}}\right )}{2}\) | \(55\) |
parallelrisch | \(\frac {2 x^{2} \ln \left (b x +a \right ) b^{2}-b^{2} x^{2}+4 x \ln \left (b x +a \right ) a b -2 a b x +2 a^{2} \ln \left (b x +a \right )+2 a^{2}}{4 b}\) | \(61\) |
[In]
[Out]
none
Time = 0.30 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.20 \[ \int (a+b x) \log (a+b x) \, dx=-\frac {b^{2} x^{2} + 2 \, a b x - 2 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )} \log \left (b x + a\right )}{4 \, b} \]
[In]
[Out]
Time = 0.10 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.17 \[ \int (a+b x) \log (a+b x) \, dx=\frac {a^{2} \log {\left (a + b x \right )}}{2 b} - \frac {a x}{2} - \frac {b x^{2}}{4} + \left (a x + \frac {b x^{2}}{2}\right ) \log {\left (a + b x \right )} \]
[In]
[Out]
none
Time = 0.19 (sec) , antiderivative size = 52, normalized size of antiderivative = 1.49 \[ \int (a+b x) \log (a+b x) \, dx=\frac {1}{4} \, b {\left (\frac {2 \, a^{2} \log \left (b x + a\right )}{b^{2}} - \frac {b x^{2} + 2 \, a x}{b}\right )} + \frac {1}{2} \, {\left (b x^{2} + 2 \, a x\right )} \log \left (b x + a\right ) \]
[In]
[Out]
none
Time = 0.31 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.89 \[ \int (a+b x) \log (a+b x) \, dx=\frac {{\left (b x + a\right )}^{2} \log \left (b x + a\right )}{2 \, b} - \frac {{\left (b x + a\right )}^{2}}{4 \, b} \]
[In]
[Out]
Time = 1.61 (sec) , antiderivative size = 46, normalized size of antiderivative = 1.31 \[ \int (a+b x) \log (a+b x) \, dx=\frac {a^2\,\ln \left (a+b\,x\right )}{2\,b}-\frac {b\,x^2}{4}-\frac {a\,x}{2}+a\,x\,\ln \left (a+b\,x\right )+\frac {b\,x^2\,\ln \left (a+b\,x\right )}{2} \]
[In]
[Out]