Integrand size = 20, antiderivative size = 71 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=\frac {1}{8 a^2 b (a-b x)^2}+\frac {1}{4 a^3 b (a-b x)}-\frac {1}{8 a^3 b (a+b x)}+\frac {3 \text {arctanh}\left (\frac {b x}{a}\right )}{8 a^4 b} \]
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Time = 0.03 (sec) , antiderivative size = 71, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.150, Rules used = {641, 46, 214} \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=\frac {3 \text {arctanh}\left (\frac {b x}{a}\right )}{8 a^4 b}+\frac {1}{4 a^3 b (a-b x)}-\frac {1}{8 a^3 b (a+b x)}+\frac {1}{8 a^2 b (a-b x)^2} \]
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Rule 46
Rule 214
Rule 641
Rubi steps \begin{align*} \text {integral}& = \int \frac {1}{(a-b x)^3 (a+b x)^2} \, dx \\ & = \int \left (\frac {1}{4 a^2 (a-b x)^3}+\frac {1}{4 a^3 (a-b x)^2}+\frac {1}{8 a^3 (a+b x)^2}+\frac {3}{8 a^3 \left (a^2-b^2 x^2\right )}\right ) \, dx \\ & = \frac {1}{8 a^2 b (a-b x)^2}+\frac {1}{4 a^3 b (a-b x)}-\frac {1}{8 a^3 b (a+b x)}+\frac {3 \int \frac {1}{a^2-b^2 x^2} \, dx}{8 a^3} \\ & = \frac {1}{8 a^2 b (a-b x)^2}+\frac {1}{4 a^3 b (a-b x)}-\frac {1}{8 a^3 b (a+b x)}+\frac {3 \tanh ^{-1}\left (\frac {b x}{a}\right )}{8 a^4 b} \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 65, normalized size of antiderivative = 0.92 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=\frac {\frac {2 a \left (2 a^2+3 a b x-3 b^2 x^2\right )}{(a-b x)^2 (a+b x)}-3 \log (a-b x)+3 \log (a+b x)}{16 a^4 b} \]
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Time = 2.15 (sec) , antiderivative size = 69, normalized size of antiderivative = 0.97
method | result | size |
norman | \(\frac {\frac {5 x}{8 a}+\frac {1}{4 b}-\frac {3 b^{2} x^{3}}{8 a^{3}}}{\left (-b^{2} x^{2}+a^{2}\right )^{2}}-\frac {3 \ln \left (-b x +a \right )}{16 a^{4} b}+\frac {3 \ln \left (b x +a \right )}{16 a^{4} b}\) | \(69\) |
default | \(\frac {3 \ln \left (b x +a \right )}{16 a^{4} b}-\frac {1}{8 a^{3} b \left (b x +a \right )}-\frac {3 \ln \left (-b x +a \right )}{16 a^{4} b}+\frac {1}{4 a^{3} b \left (-b x +a \right )}+\frac {1}{8 a^{2} b \left (-b x +a \right )^{2}}\) | \(78\) |
risch | \(\frac {-\frac {3 b \,x^{2}}{8 a^{3}}+\frac {3 x}{8 a^{2}}+\frac {1}{4 b a}}{\left (-b x +a \right ) \left (-b^{2} x^{2}+a^{2}\right )}-\frac {3 \ln \left (-b x +a \right )}{16 a^{4} b}+\frac {3 \ln \left (b x +a \right )}{16 a^{4} b}\) | \(78\) |
parallelrisch | \(-\frac {3 \ln \left (b x -a \right ) x^{3} b^{5}-3 \ln \left (b x +a \right ) x^{3} b^{5}-3 \ln \left (b x -a \right ) x^{2} a \,b^{4}+3 \ln \left (b x +a \right ) x^{2} a \,b^{4}-3 \ln \left (b x -a \right ) x \,a^{2} b^{3}+3 \ln \left (b x +a \right ) x \,a^{2} b^{3}+6 b^{4} x^{2} a +3 \ln \left (b x -a \right ) a^{3} b^{2}-3 \ln \left (b x +a \right ) a^{3} b^{2}-6 a^{2} b^{3} x -4 a^{3} b^{2}}{16 a^{4} b^{3} \left (b x -a \right ) \left (b^{2} x^{2}-a^{2}\right )}\) | \(184\) |
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Leaf count of result is larger than twice the leaf count of optimal. 134 vs. \(2 (65) = 130\).
Time = 0.28 (sec) , antiderivative size = 134, normalized size of antiderivative = 1.89 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=-\frac {6 \, a b^{2} x^{2} - 6 \, a^{2} b x - 4 \, a^{3} - 3 \, {\left (b^{3} x^{3} - a b^{2} x^{2} - a^{2} b x + a^{3}\right )} \log \left (b x + a\right ) + 3 \, {\left (b^{3} x^{3} - a b^{2} x^{2} - a^{2} b x + a^{3}\right )} \log \left (b x - a\right )}{16 \, {\left (a^{4} b^{4} x^{3} - a^{5} b^{3} x^{2} - a^{6} b^{2} x + a^{7} b\right )}} \]
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Time = 0.21 (sec) , antiderivative size = 87, normalized size of antiderivative = 1.23 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=- \frac {- 2 a^{2} - 3 a b x + 3 b^{2} x^{2}}{8 a^{6} b - 8 a^{5} b^{2} x - 8 a^{4} b^{3} x^{2} + 8 a^{3} b^{4} x^{3}} - \frac {\frac {3 \log {\left (- \frac {a}{b} + x \right )}}{16} - \frac {3 \log {\left (\frac {a}{b} + x \right )}}{16}}{a^{4} b} \]
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Time = 0.19 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.27 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=-\frac {3 \, b^{2} x^{2} - 3 \, a b x - 2 \, a^{2}}{8 \, {\left (a^{3} b^{4} x^{3} - a^{4} b^{3} x^{2} - a^{5} b^{2} x + a^{6} b\right )}} + \frac {3 \, \log \left (b x + a\right )}{16 \, a^{4} b} - \frac {3 \, \log \left (b x - a\right )}{16 \, a^{4} b} \]
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Time = 0.28 (sec) , antiderivative size = 79, normalized size of antiderivative = 1.11 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=\frac {3 \, \log \left ({\left | b x + a \right |}\right )}{16 \, a^{4} b} - \frac {3 \, \log \left ({\left | b x - a \right |}\right )}{16 \, a^{4} b} - \frac {3 \, a b^{2} x^{2} - 3 \, a^{2} b x - 2 \, a^{3}}{8 \, {\left (b x + a\right )} {\left (b x - a\right )}^{2} a^{4} b} \]
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Time = 10.00 (sec) , antiderivative size = 70, normalized size of antiderivative = 0.99 \[ \int \frac {a+b x}{\left (a^2-b^2 x^2\right )^3} \, dx=\frac {\frac {3\,x}{8\,a^2}+\frac {1}{4\,a\,b}-\frac {3\,b\,x^2}{8\,a^3}}{a^3-a^2\,b\,x-a\,b^2\,x^2+b^3\,x^3}+\frac {3\,\mathrm {atanh}\left (\frac {b\,x}{a}\right )}{8\,a^4\,b} \]
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