Integrand size = 13, antiderivative size = 28 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=\frac {2 b \log (b+a x)}{a}+x \log \left (\frac {c (b+a x)^2}{x^2}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {2536, 31} \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=x \log \left (\frac {c (a x+b)^2}{x^2}\right )+\frac {2 b \log (a x+b)}{a} \]
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Rule 31
Rule 2536
Rubi steps \begin{align*} \text {integral}& = x \log \left (\frac {c (b+a x)^2}{x^2}\right )+(2 b) \int \frac {1}{b+a x} \, dx \\ & = \frac {2 b \log (b+a x)}{a}+x \log \left (\frac {c (b+a x)^2}{x^2}\right ) \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=\frac {2 b \log (b+a x)}{a}+x \log \left (\frac {c (b+a x)^2}{x^2}\right ) \]
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Time = 0.23 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.04
method | result | size |
risch | \(\frac {2 b \ln \left (a x +b \right )}{a}+x \ln \left (\frac {c \left (a x +b \right )^{2}}{x^{2}}\right )\) | \(29\) |
parts | \(\frac {2 b \ln \left (a x +b \right )}{a}+x \ln \left (\frac {c \left (a x +b \right )^{2}}{x^{2}}\right )\) | \(29\) |
derivativedivides | \(x \ln \left (c \left (a +\frac {b}{x}\right )^{2}\right )-2 b \left (\frac {\ln \left (\frac {1}{x}\right )}{a}-\frac {\ln \left (a +\frac {b}{x}\right )}{a}\right )\) | \(41\) |
default | \(x \ln \left (c \left (a +\frac {b}{x}\right )^{2}\right )-2 b \left (\frac {\ln \left (\frac {1}{x}\right )}{a}-\frac {\ln \left (a +\frac {b}{x}\right )}{a}\right )\) | \(41\) |
parallelrisch | \(-\frac {-2 \ln \left (\frac {c \left (a x +b \right )^{2}}{x^{2}}\right ) x a -4 \ln \left (x \right ) b -2 b \ln \left (\frac {c \left (a x +b \right )^{2}}{x^{2}}\right )}{2 a}\) | \(45\) |
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none
Time = 0.29 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.50 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=\frac {a x \log \left (\frac {a^{2} c x^{2} + 2 \, a b c x + b^{2} c}{x^{2}}\right ) + 2 \, b \log \left (a x + b\right )}{a} \]
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Time = 0.06 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.93 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=x \log {\left (\frac {c \left (a x + b\right )^{2}}{x^{2}} \right )} + \frac {2 b \log {\left (a x + b \right )}}{a} \]
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Time = 0.19 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=x \log \left (\frac {{\left (a x + b\right )}^{2} c}{x^{2}}\right ) + \frac {2 \, b \log \left (a x + b\right )}{a} \]
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Time = 0.31 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.04 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=x \log \left (\frac {{\left (a x + b\right )}^{2} c}{x^{2}}\right ) + \frac {2 \, b \log \left ({\left | a x + b \right |}\right )}{a} \]
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Time = 1.25 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.00 \[ \int \log \left (\frac {c (b+a x)^2}{x^2}\right ) \, dx=x\,\ln \left (\frac {c\,{\left (b+a\,x\right )}^2}{x^2}\right )+\frac {2\,b\,\ln \left (b+a\,x\right )}{a} \]
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