Integrand size = 18, antiderivative size = 41 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=-\frac {A b-a B}{2 b^2 \left (a+b x^2\right )}+\frac {B \log \left (a+b x^2\right )}{2 b^2} \]
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Time = 0.03 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {455, 45} \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {B \log \left (a+b x^2\right )}{2 b^2}-\frac {A b-a B}{2 b^2 \left (a+b x^2\right )} \]
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Rule 45
Rule 455
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {A+B x}{(a+b x)^2} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {A b-a B}{b (a+b x)^2}+\frac {B}{b (a+b x)}\right ) \, dx,x,x^2\right ) \\ & = -\frac {A b-a B}{2 b^2 \left (a+b x^2\right )}+\frac {B \log \left (a+b x^2\right )}{2 b^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.00 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {-A b+a B}{2 b^2 \left (a+b x^2\right )}+\frac {B \log \left (a+b x^2\right )}{2 b^2} \]
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Time = 2.53 (sec) , antiderivative size = 38, normalized size of antiderivative = 0.93
method | result | size |
default | \(\frac {B \ln \left (b \,x^{2}+a \right )}{2 b^{2}}-\frac {A b -B a}{2 b^{2} \left (b \,x^{2}+a \right )}\) | \(38\) |
norman | \(\frac {B \ln \left (b \,x^{2}+a \right )}{2 b^{2}}-\frac {A b -B a}{2 b^{2} \left (b \,x^{2}+a \right )}\) | \(38\) |
risch | \(\frac {B \ln \left (b \,x^{2}+a \right )}{2 b^{2}}-\frac {A}{2 b \left (b \,x^{2}+a \right )}+\frac {B a}{2 b^{2} \left (b \,x^{2}+a \right )}\) | \(47\) |
parallelrisch | \(-\frac {-B \ln \left (b \,x^{2}+a \right ) x^{2} b -B \ln \left (b \,x^{2}+a \right ) a +A b -B a}{2 b^{2} \left (b \,x^{2}+a \right )}\) | \(50\) |
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none
Time = 0.29 (sec) , antiderivative size = 44, normalized size of antiderivative = 1.07 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {B a - A b + {\left (B b x^{2} + B a\right )} \log \left (b x^{2} + a\right )}{2 \, {\left (b^{3} x^{2} + a b^{2}\right )}} \]
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Time = 0.20 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.88 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {B \log {\left (a + b x^{2} \right )}}{2 b^{2}} + \frac {- A b + B a}{2 a b^{2} + 2 b^{3} x^{2}} \]
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none
Time = 0.19 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.98 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {B a - A b}{2 \, {\left (b^{3} x^{2} + a b^{2}\right )}} + \frac {B \log \left (b x^{2} + a\right )}{2 \, b^{2}} \]
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Time = 0.28 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.59 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=-\frac {B {\left (\frac {\log \left (\frac {{\left | b x^{2} + a \right |}}{{\left (b x^{2} + a\right )}^{2} {\left | b \right |}}\right )}{b} - \frac {a}{{\left (b x^{2} + a\right )} b}\right )}}{2 \, b} - \frac {A}{2 \, {\left (b x^{2} + a\right )} b} \]
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Time = 0.06 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.90 \[ \int \frac {x \left (A+B x^2\right )}{\left (a+b x^2\right )^2} \, dx=\frac {B\,\ln \left (b\,x^2+a\right )}{2\,b^2}-\frac {A\,b-B\,a}{2\,b^2\,\left (b\,x^2+a\right )} \]
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