Integrand size = 10, antiderivative size = 26 \[ \int \frac {a^x b^x}{x^2} \, dx=-\frac {a^x b^x}{x}+\operatorname {ExpIntegralEi}(x (\log (a)+\log (b))) (\log (a)+\log (b)) \]
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Time = 0.04 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {2325, 2208, 2209} \[ \int \frac {a^x b^x}{x^2} \, dx=(\log (a)+\log (b)) \operatorname {ExpIntegralEi}(x (\log (a)+\log (b)))-\frac {a^x b^x}{x} \]
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Rule 2208
Rule 2209
Rule 2325
Rubi steps \begin{align*} \text {integral}& = \int \frac {e^{x (\log (a)+\log (b))}}{x^2} \, dx \\ & = -\frac {a^x b^x}{x}-(-\log (a)-\log (b)) \int \frac {e^{x (\log (a)+\log (b))}}{x} \, dx \\ & = -\frac {a^x b^x}{x}+\text {Ei}(x (\log (a)+\log (b))) (\log (a)+\log (b)) \\ \end{align*}
\[ \int \frac {a^x b^x}{x^2} \, dx=\int \frac {a^x b^x}{x^2} \, dx \]
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Result contains complex when optimal does not.
Time = 0.04 (sec) , antiderivative size = 160, normalized size of antiderivative = 6.15
method | result | size |
meijerg | \(-\ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right ) \left (\frac {1}{x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )}+1-\ln \left (x \right )-i \pi -\ln \left (\ln \left (b \right )\right )-\ln \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )-\frac {2+2 x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )}{2 x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )}+\frac {{\mathrm e}^{x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )}}{x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )}+\ln \left (-x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )\right )+\operatorname {Ei}_{1}\left (-x \ln \left (b \right ) \left (1+\frac {\ln \left (a \right )}{\ln \left (b \right )}\right )\right )\right )\) | \(160\) |
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none
Time = 0.27 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.31 \[ \int \frac {a^x b^x}{x^2} \, dx=-\frac {a^{x} b^{x} - {\left (x \log \left (a\right ) + x \log \left (b\right )\right )} {\rm Ei}\left (x \log \left (a\right ) + x \log \left (b\right )\right )}{x} \]
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\[ \int \frac {a^x b^x}{x^2} \, dx=\int \frac {a^{x} b^{x}}{x^{2}}\, dx \]
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none
Time = 0.24 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.62 \[ \int \frac {a^x b^x}{x^2} \, dx={\left (\log \left (a\right ) + \log \left (b\right )\right )} \Gamma \left (-1, -x {\left (\log \left (a\right ) + \log \left (b\right )\right )}\right ) \]
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\[ \int \frac {a^x b^x}{x^2} \, dx=\int { \frac {a^{x} b^{x}}{x^{2}} \,d x } \]
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Time = 0.04 (sec) , antiderivative size = 28, normalized size of antiderivative = 1.08 \[ \int \frac {a^x b^x}{x^2} \, dx=-\mathrm {expint}\left (-x\,\left (\ln \left (a\right )+\ln \left (b\right )\right )\right )\,\left (\ln \left (a\right )+\ln \left (b\right )\right )-\frac {a^x\,b^x}{x} \]
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