Integrand size = 14, antiderivative size = 47 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {b p x}{2 a}+\frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )-\frac {b^2 p \log (b+a x)}{2 a^2} \]
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Time = 0.01 (sec) , antiderivative size = 47, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.214, Rules used = {2505, 199, 45} \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=-\frac {b^2 p \log (a x+b)}{2 a^2}+\frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )+\frac {b p x}{2 a} \]
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Rule 45
Rule 199
Rule 2505
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )+\frac {1}{2} (b p) \int \frac {1}{a+\frac {b}{x}} \, dx \\ & = \frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )+\frac {1}{2} (b p) \int \frac {x}{b+a x} \, dx \\ & = \frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )+\frac {1}{2} (b p) \int \left (\frac {1}{a}-\frac {b}{a (b+a x)}\right ) \, dx \\ & = \frac {b p x}{2 a}+\frac {1}{2} x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )-\frac {b^2 p \log (b+a x)}{2 a^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.85 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {1}{2} \left (x^2 \log \left (c \left (a+\frac {b}{x}\right )^p\right )+\frac {b p (a x-b \log (b+a x))}{a^2}\right ) \]
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Time = 0.10 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.87
method | result | size |
parts | \(\frac {x^{2} \ln \left (c \left (a +\frac {b}{x}\right )^{p}\right )}{2}+\frac {p b \left (\frac {x}{a}-\frac {b \ln \left (a x +b \right )}{a^{2}}\right )}{2}\) | \(41\) |
parallelrisch | \(-\frac {-x^{2} \ln \left (c \left (\frac {a x +b}{x}\right )^{p}\right ) a^{2} p +\ln \left (x \right ) b^{2} p^{2}-x a b \,p^{2}+\ln \left (c \left (\frac {a x +b}{x}\right )^{p}\right ) b^{2} p +b^{2} p^{2}}{2 a^{2} p}\) | \(76\) |
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Time = 0.36 (sec) , antiderivative size = 50, normalized size of antiderivative = 1.06 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {a^{2} p x^{2} \log \left (\frac {a x + b}{x}\right ) + a^{2} x^{2} \log \left (c\right ) + a b p x - b^{2} p \log \left (a x + b\right )}{2 \, a^{2}} \]
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Time = 0.52 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.28 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\begin {cases} \frac {x^{2} \log {\left (c \left (a + \frac {b}{x}\right )^{p} \right )}}{2} + \frac {b p x}{2 a} - \frac {b^{2} p \log {\left (a x + b \right )}}{2 a^{2}} & \text {for}\: a \neq 0 \\\frac {p x^{2}}{4} + \frac {x^{2} \log {\left (c \left (\frac {b}{x}\right )^{p} \right )}}{2} & \text {otherwise} \end {cases} \]
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Time = 0.20 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.85 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {1}{2} \, b p {\left (\frac {x}{a} - \frac {b \log \left (a x + b\right )}{a^{2}}\right )} + \frac {1}{2} \, x^{2} \log \left ({\left (a + \frac {b}{x}\right )}^{p} c\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 152 vs. \(2 (41) = 82\).
Time = 0.31 (sec) , antiderivative size = 152, normalized size of antiderivative = 3.23 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {\frac {b^{3} p \log \left (\frac {a x + b}{x}\right )}{a^{2} - \frac {2 \, {\left (a x + b\right )} a}{x} + \frac {{\left (a x + b\right )}^{2}}{x^{2}}} + \frac {b^{3} p \log \left (-a + \frac {a x + b}{x}\right )}{a^{2}} - \frac {b^{3} p \log \left (\frac {a x + b}{x}\right )}{a^{2}} - \frac {a b^{3} p - a b^{3} \log \left (c\right ) - \frac {{\left (a x + b\right )} b^{3} p}{x}}{a^{3} - \frac {2 \, {\left (a x + b\right )} a^{2}}{x} + \frac {{\left (a x + b\right )}^{2} a}{x^{2}}}}{2 \, b} \]
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Time = 1.29 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.87 \[ \int x \log \left (c \left (a+\frac {b}{x}\right )^p\right ) \, dx=\frac {x^2\,\ln \left (c\,{\left (a+\frac {b}{x}\right )}^p\right )}{2}+\frac {b\,p\,x}{2\,a}-\frac {b^2\,p\,\ln \left (b+a\,x\right )}{2\,a^2} \]
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