Integrand size = 11, antiderivative size = 13 \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} e^{2-x^2} \]
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Time = 0.01 (sec) , antiderivative size = 13, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {2240} \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} e^{2-x^2} \]
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Rule 2240
Rubi steps \begin{align*} \text {integral}& = -\frac {1}{2} e^{2-x^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 13, normalized size of antiderivative = 1.00 \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} e^{2-x^2} \]
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Time = 0.03 (sec) , antiderivative size = 11, normalized size of antiderivative = 0.85
method | result | size |
gosper | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
derivativedivides | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
default | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
norman | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
risch | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
parallelrisch | \(-\frac {{\mathrm e}^{-x^{2}+2}}{2}\) | \(11\) |
meijerg | \(\frac {{\mathrm e}^{2} \left (1-{\mathrm e}^{-x^{2}}\right )}{2}\) | \(15\) |
parts | \(\frac {{\mathrm e}^{2} \operatorname {erf}\left (x \right ) \sqrt {\pi }\, x}{2}-\frac {{\mathrm e}^{2} \left (x \,\operatorname {erf}\left (x \right ) \sqrt {\pi }+{\mathrm e}^{-x^{2}}\right )}{2}\) | \(30\) |
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none
Time = 0.28 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.77 \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} \, e^{\left (-x^{2} + 2\right )} \]
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Time = 0.03 (sec) , antiderivative size = 8, normalized size of antiderivative = 0.62 \[ \int e^{2-x^2} x \, dx=- \frac {e^{2 - x^{2}}}{2} \]
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none
Time = 0.23 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.77 \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} \, e^{\left (-x^{2} + 2\right )} \]
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none
Time = 0.31 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.77 \[ \int e^{2-x^2} x \, dx=-\frac {1}{2} \, e^{\left (-x^{2} + 2\right )} \]
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Time = 0.24 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.77 \[ \int e^{2-x^2} x \, dx=-\frac {{\mathrm {e}}^2\,{\mathrm {e}}^{-x^2}}{2} \]
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