Integrand size = 11, antiderivative size = 19 \[ \int \frac {1}{x^2 (1+b x)} \, dx=-\frac {1}{x}-b \log (x)+b \log (1+b x) \]
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Time = 0.01 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {46} \[ \int \frac {1}{x^2 (1+b x)} \, dx=-b \log (x)+b \log (b x+1)-\frac {1}{x} \]
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Rule 46
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {1}{x^2}-\frac {b}{x}+\frac {b^2}{1+b x}\right ) \, dx \\ & = -\frac {1}{x}-b \log (x)+b \log (1+b x) \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.00 \[ \int \frac {1}{x^2 (1+b x)} \, dx=-\frac {1}{x}-b \log (x)+b \log (1+b x) \]
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Time = 0.05 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.05
method | result | size |
default | \(-\frac {1}{x}-b \ln \left (x \right )+b \ln \left (b x +1\right )\) | \(20\) |
norman | \(-\frac {1}{x}-b \ln \left (x \right )+b \ln \left (b x +1\right )\) | \(20\) |
risch | \(-\frac {1}{x}-b \ln \left (x \right )+b \ln \left (-b x -1\right )\) | \(21\) |
parallelrisch | \(-\frac {b \ln \left (x \right ) x -b \ln \left (b x +1\right ) x +1}{x}\) | \(23\) |
meijerg | \(b \left (-\frac {1}{x b}-\ln \left (x \right )-\ln \left (b \right )+\ln \left (b x +1\right )\right )\) | \(26\) |
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none
Time = 0.22 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.11 \[ \int \frac {1}{x^2 (1+b x)} \, dx=\frac {b x \log \left (b x + 1\right ) - b x \log \left (x\right ) - 1}{x} \]
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Time = 0.06 (sec) , antiderivative size = 14, normalized size of antiderivative = 0.74 \[ \int \frac {1}{x^2 (1+b x)} \, dx=b \left (- \log {\left (x \right )} + \log {\left (x + \frac {1}{b} \right )}\right ) - \frac {1}{x} \]
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none
Time = 0.20 (sec) , antiderivative size = 19, normalized size of antiderivative = 1.00 \[ \int \frac {1}{x^2 (1+b x)} \, dx=b \log \left (b x + 1\right ) - b \log \left (x\right ) - \frac {1}{x} \]
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none
Time = 0.30 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.11 \[ \int \frac {1}{x^2 (1+b x)} \, dx=b \log \left ({\left | b x + 1 \right |}\right ) - b \log \left ({\left | x \right |}\right ) - \frac {1}{x} \]
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Time = 0.05 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.84 \[ \int \frac {1}{x^2 (1+b x)} \, dx=2\,b\,\mathrm {atanh}\left (2\,b\,x+1\right )-\frac {1}{x} \]
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