Integrand size = 15, antiderivative size = 56 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {1}{(b c-a d) (c+d x)}+\frac {b \log (a+b x)}{(b c-a d)^2}-\frac {b \log (c+d x)}{(b c-a d)^2} \]
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Time = 0.02 (sec) , antiderivative size = 56, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.067, Rules used = {46} \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {1}{(c+d x) (b c-a d)}+\frac {b \log (a+b x)}{(b c-a d)^2}-\frac {b \log (c+d x)}{(b c-a d)^2} \]
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Rule 46
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {b^2}{(b c-a d)^2 (a+b x)}-\frac {d}{(b c-a d) (c+d x)^2}-\frac {b d}{(b c-a d)^2 (c+d x)}\right ) \, dx \\ & = \frac {1}{(b c-a d) (c+d x)}+\frac {b \log (a+b x)}{(b c-a d)^2}-\frac {b \log (c+d x)}{(b c-a d)^2} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.95 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {b c-a d+b (c+d x) \log (a+b x)-b (c+d x) \log (c+d x)}{(b c-a d)^2 (c+d x)} \]
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Time = 0.46 (sec) , antiderivative size = 58, normalized size of antiderivative = 1.04
method | result | size |
default | \(-\frac {1}{\left (a d -b c \right ) \left (d x +c \right )}-\frac {b \ln \left (d x +c \right )}{\left (a d -b c \right )^{2}}+\frac {b \ln \left (b x +a \right )}{\left (a d -b c \right )^{2}}\) | \(58\) |
risch | \(-\frac {1}{\left (a d -b c \right ) \left (d x +c \right )}+\frac {b \ln \left (-b x -a \right )}{a^{2} d^{2}-2 a b c d +b^{2} c^{2}}-\frac {b \ln \left (d x +c \right )}{a^{2} d^{2}-2 a b c d +b^{2} c^{2}}\) | \(87\) |
norman | \(\frac {d x}{c \left (a d -b c \right ) \left (d x +c \right )}+\frac {b \ln \left (b x +a \right )}{a^{2} d^{2}-2 a b c d +b^{2} c^{2}}-\frac {b \ln \left (d x +c \right )}{a^{2} d^{2}-2 a b c d +b^{2} c^{2}}\) | \(88\) |
parallelrisch | \(\frac {\ln \left (b x +a \right ) x b c d -\ln \left (d x +c \right ) x b c d +\ln \left (b x +a \right ) b \,c^{2}-\ln \left (d x +c \right ) b \,c^{2}+x a \,d^{2}-x b c d}{\left (a^{2} d^{2}-2 a b c d +b^{2} c^{2}\right ) \left (d x +c \right ) c}\) | \(94\) |
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Time = 0.23 (sec) , antiderivative size = 92, normalized size of antiderivative = 1.64 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {b c - a d + {\left (b d x + b c\right )} \log \left (b x + a\right ) - {\left (b d x + b c\right )} \log \left (d x + c\right )}{b^{2} c^{3} - 2 \, a b c^{2} d + a^{2} c d^{2} + {\left (b^{2} c^{2} d - 2 \, a b c d^{2} + a^{2} d^{3}\right )} x} \]
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Leaf count of result is larger than twice the leaf count of optimal. 233 vs. \(2 (46) = 92\).
Time = 0.37 (sec) , antiderivative size = 233, normalized size of antiderivative = 4.16 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=- \frac {b \log {\left (x + \frac {- \frac {a^{3} b d^{3}}{\left (a d - b c\right )^{2}} + \frac {3 a^{2} b^{2} c d^{2}}{\left (a d - b c\right )^{2}} - \frac {3 a b^{3} c^{2} d}{\left (a d - b c\right )^{2}} + a b d + \frac {b^{4} c^{3}}{\left (a d - b c\right )^{2}} + b^{2} c}{2 b^{2} d} \right )}}{\left (a d - b c\right )^{2}} + \frac {b \log {\left (x + \frac {\frac {a^{3} b d^{3}}{\left (a d - b c\right )^{2}} - \frac {3 a^{2} b^{2} c d^{2}}{\left (a d - b c\right )^{2}} + \frac {3 a b^{3} c^{2} d}{\left (a d - b c\right )^{2}} + a b d - \frac {b^{4} c^{3}}{\left (a d - b c\right )^{2}} + b^{2} c}{2 b^{2} d} \right )}}{\left (a d - b c\right )^{2}} - \frac {1}{a c d - b c^{2} + x \left (a d^{2} - b c d\right )} \]
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Time = 0.20 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.61 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {b \log \left (b x + a\right )}{b^{2} c^{2} - 2 \, a b c d + a^{2} d^{2}} - \frac {b \log \left (d x + c\right )}{b^{2} c^{2} - 2 \, a b c d + a^{2} d^{2}} + \frac {1}{b c^{2} - a c d + {\left (b c d - a d^{2}\right )} x} \]
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Time = 0.27 (sec) , antiderivative size = 77, normalized size of antiderivative = 1.38 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=\frac {b d \log \left ({\left | b - \frac {b c}{d x + c} + \frac {a d}{d x + c} \right |}\right )}{b^{2} c^{2} d - 2 \, a b c d^{2} + a^{2} d^{3}} + \frac {d}{{\left (b c d - a d^{2}\right )} {\left (d x + c\right )}} \]
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Time = 0.11 (sec) , antiderivative size = 47, normalized size of antiderivative = 0.84 \[ \int \frac {1}{(a+b x) (c+d x)^2} \, dx=-\frac {1}{\left (a\,d-b\,c\right )\,\left (c+d\,x\right )}-\frac {b\,\ln \left (\frac {c+d\,x}{a+b\,x}\right )}{{\left (a\,d-b\,c\right )}^2} \]
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