Integrand size = 22, antiderivative size = 44 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {b^2-4 a c}{16 c^2 d^3 (b+2 c x)^2}+\frac {\log (b+2 c x)}{8 c^2 d^3} \]
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Time = 0.02 (sec) , antiderivative size = 44, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.045, Rules used = {697} \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {b^2-4 a c}{16 c^2 d^3 (b+2 c x)^2}+\frac {\log (b+2 c x)}{8 c^2 d^3} \]
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Rule 697
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {-b^2+4 a c}{4 c d^3 (b+2 c x)^3}+\frac {1}{4 c d^3 (b+2 c x)}\right ) \, dx \\ & = \frac {b^2-4 a c}{16 c^2 d^3 (b+2 c x)^2}+\frac {\log (b+2 c x)}{8 c^2 d^3} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.84 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {\frac {b^2-4 a c}{(b+2 c x)^2}+2 \log (b+2 c x)}{16 c^2 d^3} \]
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Time = 2.12 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.93
method | result | size |
default | \(\frac {\frac {\ln \left (2 c x +b \right )}{8 c^{2}}-\frac {4 a c -b^{2}}{16 c^{2} \left (2 c x +b \right )^{2}}}{d^{3}}\) | \(41\) |
norman | \(-\frac {4 a c -b^{2}}{16 c^{2} d^{3} \left (2 c x +b \right )^{2}}+\frac {\ln \left (2 c x +b \right )}{8 c^{2} d^{3}}\) | \(43\) |
risch | \(-\frac {a}{4 c \,d^{3} \left (2 c x +b \right )^{2}}+\frac {b^{2}}{16 c^{2} d^{3} \left (2 c x +b \right )^{2}}+\frac {\ln \left (2 c x +b \right )}{8 c^{2} d^{3}}\) | \(53\) |
parallelrisch | \(\frac {4 \ln \left (\frac {b}{2}+c x \right ) x^{2} b^{2} c^{2}+4 \ln \left (\frac {b}{2}+c x \right ) x \,b^{3} c +8 x^{2} a \,c^{3}-2 b^{2} c^{2} x^{2}+\ln \left (\frac {b}{2}+c x \right ) b^{4}+8 a b \,c^{2} x -2 b^{3} c x}{8 b^{2} c^{2} d^{3} \left (2 c x +b \right )^{2}}\) | \(102\) |
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Time = 0.26 (sec) , antiderivative size = 70, normalized size of antiderivative = 1.59 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {b^{2} - 4 \, a c + 2 \, {\left (4 \, c^{2} x^{2} + 4 \, b c x + b^{2}\right )} \log \left (2 \, c x + b\right )}{16 \, {\left (4 \, c^{4} d^{3} x^{2} + 4 \, b c^{3} d^{3} x + b^{2} c^{2} d^{3}\right )}} \]
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Time = 0.21 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.36 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {- 4 a c + b^{2}}{16 b^{2} c^{2} d^{3} + 64 b c^{3} d^{3} x + 64 c^{4} d^{3} x^{2}} + \frac {\log {\left (b + 2 c x \right )}}{8 c^{2} d^{3}} \]
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Time = 0.20 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.36 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {b^{2} - 4 \, a c}{16 \, {\left (4 \, c^{4} d^{3} x^{2} + 4 \, b c^{3} d^{3} x + b^{2} c^{2} d^{3}\right )}} + \frac {\log \left (2 \, c x + b\right )}{8 \, c^{2} d^{3}} \]
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Time = 0.28 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.93 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {\log \left ({\left | 2 \, c x + b \right |}\right )}{8 \, c^{2} d^{3}} + \frac {b^{2} - 4 \, a c}{16 \, {\left (2 \, c x + b\right )}^{2} c^{2} d^{3}} \]
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Time = 9.96 (sec) , antiderivative size = 42, normalized size of antiderivative = 0.95 \[ \int \frac {a+b x+c x^2}{(b d+2 c d x)^3} \, dx=\frac {\ln \left (b+2\,c\,x\right )}{8\,c^2\,d^3}-\frac {\frac {a\,c}{4}-\frac {b^2}{16}}{c^2\,d^3\,{\left (b+2\,c\,x\right )}^2} \]
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