Integrand size = 17, antiderivative size = 42 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=-\frac {1}{a^2 x}-\frac {b}{a^2 (a+b x)}-\frac {2 b \log (x)}{a^3}+\frac {2 b \log (a+b x)}{a^3} \]
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Time = 0.02 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.118, Rules used = {1598, 46} \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=-\frac {2 b \log (x)}{a^3}+\frac {2 b \log (a+b x)}{a^3}-\frac {b}{a^2 (a+b x)}-\frac {1}{a^2 x} \]
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Rule 46
Rule 1598
Rubi steps \begin{align*} \text {integral}& = \int \frac {1}{x^2 (a+b x)^2} \, dx \\ & = \int \left (\frac {1}{a^2 x^2}-\frac {2 b}{a^3 x}+\frac {b^2}{a^2 (a+b x)^2}+\frac {2 b^2}{a^3 (a+b x)}\right ) \, dx \\ & = -\frac {1}{a^2 x}-\frac {b}{a^2 (a+b x)}-\frac {2 b \log (x)}{a^3}+\frac {2 b \log (a+b x)}{a^3} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.83 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=-\frac {a \left (\frac {1}{x}+\frac {b}{a+b x}\right )+2 b \log (x)-2 b \log (a+b x)}{a^3} \]
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Time = 2.36 (sec) , antiderivative size = 43, normalized size of antiderivative = 1.02
method | result | size |
default | \(-\frac {1}{a^{2} x}-\frac {b}{a^{2} \left (b x +a \right )}-\frac {2 b \ln \left (x \right )}{a^{3}}+\frac {2 b \ln \left (b x +a \right )}{a^{3}}\) | \(43\) |
risch | \(\frac {-\frac {2 b x}{a^{2}}-\frac {1}{a}}{x \left (b x +a \right )}-\frac {2 b \ln \left (x \right )}{a^{3}}+\frac {2 b \ln \left (-b x -a \right )}{a^{3}}\) | \(49\) |
norman | \(\frac {\frac {2 b^{2} x^{4}}{a^{3}}-\frac {x^{2}}{a}}{x^{3} \left (b x +a \right )}-\frac {2 b \ln \left (x \right )}{a^{3}}+\frac {2 b \ln \left (b x +a \right )}{a^{3}}\) | \(53\) |
parallelrisch | \(-\frac {2 b^{2} \ln \left (x \right ) x^{2}-2 b^{2} \ln \left (b x +a \right ) x^{2}+2 a b \ln \left (x \right ) x -2 \ln \left (b x +a \right ) x a b -2 b^{2} x^{2}+a^{2}}{a^{3} x \left (b x +a \right )}\) | \(70\) |
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Time = 0.26 (sec) , antiderivative size = 63, normalized size of antiderivative = 1.50 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=-\frac {2 \, a b x + a^{2} - 2 \, {\left (b^{2} x^{2} + a b x\right )} \log \left (b x + a\right ) + 2 \, {\left (b^{2} x^{2} + a b x\right )} \log \left (x\right )}{a^{3} b x^{2} + a^{4} x} \]
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Time = 0.13 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.88 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=\frac {- a - 2 b x}{a^{3} x + a^{2} b x^{2}} + \frac {2 b \left (- \log {\left (x \right )} + \log {\left (\frac {a}{b} + x \right )}\right )}{a^{3}} \]
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Time = 0.21 (sec) , antiderivative size = 45, normalized size of antiderivative = 1.07 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=-\frac {2 \, b x + a}{a^{2} b x^{2} + a^{3} x} + \frac {2 \, b \log \left (b x + a\right )}{a^{3}} - \frac {2 \, b \log \left (x\right )}{a^{3}} \]
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Time = 0.28 (sec) , antiderivative size = 45, normalized size of antiderivative = 1.07 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=\frac {2 \, b \log \left ({\left | b x + a \right |}\right )}{a^{3}} - \frac {2 \, b \log \left ({\left | x \right |}\right )}{a^{3}} - \frac {2 \, b x + a}{{\left (b x^{2} + a x\right )} a^{2}} \]
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Time = 8.84 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.98 \[ \int \frac {x^2}{\left (a x^2+b x^3\right )^2} \, dx=\frac {4\,b\,\mathrm {atanh}\left (\frac {2\,b\,x}{a}+1\right )}{a^3}-\frac {\frac {1}{a}+\frac {2\,b\,x}{a^2}}{b\,x^2+a\,x} \]
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