Integrand size = 14, antiderivative size = 55 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {a (A b-a B)}{2 b^3 (a+b x)^2}-\frac {A b-2 a B}{b^3 (a+b x)}+\frac {B \log (a+b x)}{b^3} \]
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Time = 0.03 (sec) , antiderivative size = 55, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.071, Rules used = {78} \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=-\frac {A b-2 a B}{b^3 (a+b x)}+\frac {a (A b-a B)}{2 b^3 (a+b x)^2}+\frac {B \log (a+b x)}{b^3} \]
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Rule 78
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {a (-A b+a B)}{b^2 (a+b x)^3}+\frac {A b-2 a B}{b^2 (a+b x)^2}+\frac {B}{b^2 (a+b x)}\right ) \, dx \\ & = \frac {a (A b-a B)}{2 b^3 (a+b x)^2}-\frac {A b-2 a B}{b^3 (a+b x)}+\frac {B \log (a+b x)}{b^3} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.98 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {3 a^2 B-2 A b^2 x-a b (A-4 B x)+2 B (a+b x)^2 \log (a+b x)}{2 b^3 (a+b x)^2} \]
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Time = 0.42 (sec) , antiderivative size = 50, normalized size of antiderivative = 0.91
method | result | size |
norman | \(\frac {-\frac {a \left (A b -3 B a \right )}{2 b^{3}}-\frac {\left (A b -2 B a \right ) x}{b^{2}}}{\left (b x +a \right )^{2}}+\frac {B \ln \left (b x +a \right )}{b^{3}}\) | \(50\) |
risch | \(\frac {-\frac {a \left (A b -3 B a \right )}{2 b^{3}}-\frac {\left (A b -2 B a \right ) x}{b^{2}}}{\left (b x +a \right )^{2}}+\frac {B \ln \left (b x +a \right )}{b^{3}}\) | \(50\) |
default | \(\frac {B \ln \left (b x +a \right )}{b^{3}}+\frac {a \left (A b -B a \right )}{2 b^{3} \left (b x +a \right )^{2}}-\frac {A b -2 B a}{b^{3} \left (b x +a \right )}\) | \(54\) |
parallelrisch | \(-\frac {-2 B \ln \left (b x +a \right ) x^{2} b^{2}-4 B \ln \left (b x +a \right ) x a b +2 A \,b^{2} x -2 B \ln \left (b x +a \right ) a^{2}-4 B a b x +a b A -3 a^{2} B}{2 b^{3} \left (b x +a \right )^{2}}\) | \(76\) |
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none
Time = 0.22 (sec) , antiderivative size = 81, normalized size of antiderivative = 1.47 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {3 \, B a^{2} - A a b + 2 \, {\left (2 \, B a b - A b^{2}\right )} x + 2 \, {\left (B b^{2} x^{2} + 2 \, B a b x + B a^{2}\right )} \log \left (b x + a\right )}{2 \, {\left (b^{5} x^{2} + 2 \, a b^{4} x + a^{2} b^{3}\right )}} \]
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Time = 0.18 (sec) , antiderivative size = 63, normalized size of antiderivative = 1.15 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {B \log {\left (a + b x \right )}}{b^{3}} + \frac {- A a b + 3 B a^{2} + x \left (- 2 A b^{2} + 4 B a b\right )}{2 a^{2} b^{3} + 4 a b^{4} x + 2 b^{5} x^{2}} \]
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none
Time = 0.20 (sec) , antiderivative size = 65, normalized size of antiderivative = 1.18 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {3 \, B a^{2} - A a b + 2 \, {\left (2 \, B a b - A b^{2}\right )} x}{2 \, {\left (b^{5} x^{2} + 2 \, a b^{4} x + a^{2} b^{3}\right )}} + \frac {B \log \left (b x + a\right )}{b^{3}} \]
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none
Time = 0.29 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.98 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {B \log \left ({\left | b x + a \right |}\right )}{b^{3}} + \frac {2 \, {\left (2 \, B a - A b\right )} x + \frac {3 \, B a^{2} - A a b}{b}}{2 \, {\left (b x + a\right )}^{2} b^{2}} \]
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Time = 0.43 (sec) , antiderivative size = 63, normalized size of antiderivative = 1.15 \[ \int \frac {x (A+B x)}{(a+b x)^3} \, dx=\frac {\frac {3\,B\,a^2-A\,a\,b}{2\,b^3}-\frac {x\,\left (A\,b-2\,B\,a\right )}{b^2}}{a^2+2\,a\,b\,x+b^2\,x^2}+\frac {B\,\ln \left (a+b\,x\right )}{b^3} \]
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