Integrand size = 11, antiderivative size = 72 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=-\frac {b+2 c x}{2 b^2 \left (b x+c x^2\right )^2}+\frac {3 c (b+2 c x)}{b^4 \left (b x+c x^2\right )}+\frac {6 c^2 \log (x)}{b^5}-\frac {6 c^2 \log (b+c x)}{b^5} \]
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Time = 0.01 (sec) , antiderivative size = 72, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.182, Rules used = {628, 629} \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {6 c^2 \log (x)}{b^5}-\frac {6 c^2 \log (b+c x)}{b^5}+\frac {3 c (b+2 c x)}{b^4 \left (b x+c x^2\right )}-\frac {b+2 c x}{2 b^2 \left (b x+c x^2\right )^2} \]
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Rule 628
Rule 629
Rubi steps \begin{align*} \text {integral}& = -\frac {b+2 c x}{2 b^2 \left (b x+c x^2\right )^2}-\frac {(3 c) \int \frac {1}{\left (b x+c x^2\right )^2} \, dx}{b^2} \\ & = -\frac {b+2 c x}{2 b^2 \left (b x+c x^2\right )^2}+\frac {3 c (b+2 c x)}{b^4 \left (b x+c x^2\right )}+\frac {\left (6 c^2\right ) \int \frac {1}{b x+c x^2} \, dx}{b^4} \\ & = -\frac {b+2 c x}{2 b^2 \left (b x+c x^2\right )^2}+\frac {3 c (b+2 c x)}{b^4 \left (b x+c x^2\right )}+\frac {6 c^2 \log (x)}{b^5}-\frac {6 c^2 \log (b+c x)}{b^5} \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 68, normalized size of antiderivative = 0.94 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {\frac {b \left (-b^3+4 b^2 c x+18 b c^2 x^2+12 c^3 x^3\right )}{x^2 (b+c x)^2}+12 c^2 \log (x)-12 c^2 \log (b+c x)}{2 b^5} \]
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Time = 1.97 (sec) , antiderivative size = 72, normalized size of antiderivative = 1.00
method | result | size |
norman | \(\frac {-\frac {9 c^{4} x^{4}}{b^{5}}-\frac {1}{2 b}+\frac {2 c x}{b^{2}}-\frac {12 c^{3} x^{3}}{b^{4}}}{x^{2} \left (c x +b \right )^{2}}+\frac {6 c^{2} \ln \left (x \right )}{b^{5}}-\frac {6 c^{2} \ln \left (c x +b \right )}{b^{5}}\) | \(72\) |
default | \(-\frac {1}{2 b^{3} x^{2}}+\frac {6 c^{2} \ln \left (x \right )}{b^{5}}+\frac {3 c}{b^{4} x}-\frac {6 c^{2} \ln \left (c x +b \right )}{b^{5}}+\frac {3 c^{2}}{b^{4} \left (c x +b \right )}+\frac {c^{2}}{2 b^{3} \left (c x +b \right )^{2}}\) | \(73\) |
risch | \(\frac {\frac {6 c^{3} x^{3}}{b^{4}}+\frac {9 c^{2} x^{2}}{b^{3}}+\frac {2 c x}{b^{2}}-\frac {1}{2 b}}{x^{2} \left (c x +b \right )^{2}}-\frac {6 c^{2} \ln \left (c x +b \right )}{b^{5}}+\frac {6 c^{2} \ln \left (-x \right )}{b^{5}}\) | \(74\) |
parallelrisch | \(\frac {12 \ln \left (x \right ) x^{4} c^{6}-12 \ln \left (c x +b \right ) x^{4} c^{6}+24 \ln \left (x \right ) x^{3} b \,c^{5}-24 \ln \left (c x +b \right ) x^{3} b \,c^{5}+12 \ln \left (x \right ) x^{2} b^{2} c^{4}-12 \ln \left (c x +b \right ) x^{2} b^{2} c^{4}+12 x^{3} b \,c^{5}+18 x^{2} b^{2} c^{4}+4 b^{3} c^{3} x -b^{4} c^{2}}{2 b^{5} c^{2} x^{2} \left (c x +b \right )^{2}}\) | \(137\) |
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Time = 0.26 (sec) , antiderivative size = 130, normalized size of antiderivative = 1.81 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {12 \, b c^{3} x^{3} + 18 \, b^{2} c^{2} x^{2} + 4 \, b^{3} c x - b^{4} - 12 \, {\left (c^{4} x^{4} + 2 \, b c^{3} x^{3} + b^{2} c^{2} x^{2}\right )} \log \left (c x + b\right ) + 12 \, {\left (c^{4} x^{4} + 2 \, b c^{3} x^{3} + b^{2} c^{2} x^{2}\right )} \log \left (x\right )}{2 \, {\left (b^{5} c^{2} x^{4} + 2 \, b^{6} c x^{3} + b^{7} x^{2}\right )}} \]
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Time = 0.19 (sec) , antiderivative size = 78, normalized size of antiderivative = 1.08 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {- b^{3} + 4 b^{2} c x + 18 b c^{2} x^{2} + 12 c^{3} x^{3}}{2 b^{6} x^{2} + 4 b^{5} c x^{3} + 2 b^{4} c^{2} x^{4}} + \frac {6 c^{2} \left (\log {\left (x \right )} - \log {\left (\frac {b}{c} + x \right )}\right )}{b^{5}} \]
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Time = 0.19 (sec) , antiderivative size = 86, normalized size of antiderivative = 1.19 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {12 \, c^{3} x^{3} + 18 \, b c^{2} x^{2} + 4 \, b^{2} c x - b^{3}}{2 \, {\left (b^{4} c^{2} x^{4} + 2 \, b^{5} c x^{3} + b^{6} x^{2}\right )}} - \frac {6 \, c^{2} \log \left (c x + b\right )}{b^{5}} + \frac {6 \, c^{2} \log \left (x\right )}{b^{5}} \]
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Time = 0.26 (sec) , antiderivative size = 73, normalized size of antiderivative = 1.01 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=-\frac {6 \, c^{2} \log \left ({\left | c x + b \right |}\right )}{b^{5}} + \frac {6 \, c^{2} \log \left ({\left | x \right |}\right )}{b^{5}} + \frac {12 \, c^{3} x^{3} + 18 \, b c^{2} x^{2} + 4 \, b^{2} c x - b^{3}}{2 \, {\left (c x^{2} + b x\right )}^{2} b^{4}} \]
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Time = 0.10 (sec) , antiderivative size = 79, normalized size of antiderivative = 1.10 \[ \int \frac {1}{\left (b x+c x^2\right )^3} \, dx=\frac {\frac {9\,c^2\,x^2}{b^3}-\frac {1}{2\,b}+\frac {6\,c^3\,x^3}{b^4}+\frac {2\,c\,x}{b^2}}{b^2\,x^2+2\,b\,c\,x^3+c^2\,x^4}-\frac {12\,c^2\,\mathrm {atanh}\left (\frac {2\,c\,x}{b}+1\right )}{b^5} \]
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