Integrand size = 13, antiderivative size = 34 \[ \int \sqrt {e^{a+b x}} x \, dx=-\frac {4 \sqrt {e^{a+b x}}}{b^2}+\frac {2 \sqrt {e^{a+b x}} x}{b} \]
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Time = 0.02 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {2207, 2225} \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2 x \sqrt {e^{a+b x}}}{b}-\frac {4 \sqrt {e^{a+b x}}}{b^2} \]
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Rule 2207
Rule 2225
Rubi steps \begin{align*} \text {integral}& = \frac {2 \sqrt {e^{a+b x}} x}{b}-\frac {2 \int \sqrt {e^{a+b x}} \, dx}{b} \\ & = -\frac {4 \sqrt {e^{a+b x}}}{b^2}+\frac {2 \sqrt {e^{a+b x}} x}{b} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.62 \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2 \sqrt {e^{a+b x}} (-2+b x)}{b^2} \]
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Time = 0.02 (sec) , antiderivative size = 19, normalized size of antiderivative = 0.56
method | result | size |
gosper | \(\frac {2 \left (b x -2\right ) \sqrt {{\mathrm e}^{b x +a}}}{b^{2}}\) | \(19\) |
risch | \(\frac {2 \left (b x -2\right ) \sqrt {{\mathrm e}^{b x +a}}}{b^{2}}\) | \(19\) |
parallelrisch | \(\frac {2 b \sqrt {{\mathrm e}^{b x +a}}\, x -4 \sqrt {{\mathrm e}^{b x +a}}}{b^{2}}\) | \(28\) |
meijerg | \(\frac {4 \sqrt {{\mathrm e}^{b x +a}}\, {\mathrm e}^{-a -\frac {b x \,{\mathrm e}^{\frac {a}{2}}}{2}} \left (1-\frac {\left (-b x \,{\mathrm e}^{\frac {a}{2}}+2\right ) {\mathrm e}^{\frac {b x \,{\mathrm e}^{\frac {a}{2}}}{2}}}{2}\right )}{b^{2}}\) | \(50\) |
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Time = 0.25 (sec) , antiderivative size = 19, normalized size of antiderivative = 0.56 \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2 \, {\left (b x - 2\right )} e^{\left (\frac {1}{2} \, b x + \frac {1}{2} \, a\right )}}{b^{2}} \]
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Time = 0.05 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.76 \[ \int \sqrt {e^{a+b x}} x \, dx=\begin {cases} \frac {\left (2 b x - 4\right ) \sqrt {e^{a + b x}}}{b^{2}} & \text {for}\: b^{2} \neq 0 \\\frac {x^{2}}{2} & \text {otherwise} \end {cases} \]
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Time = 0.18 (sec) , antiderivative size = 24, normalized size of antiderivative = 0.71 \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2 \, {\left (b x e^{\left (\frac {1}{2} \, a\right )} - 2 \, e^{\left (\frac {1}{2} \, a\right )}\right )} e^{\left (\frac {1}{2} \, b x\right )}}{b^{2}} \]
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Time = 0.35 (sec) , antiderivative size = 19, normalized size of antiderivative = 0.56 \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2 \, {\left (b x - 2\right )} e^{\left (\frac {1}{2} \, b x + \frac {1}{2} \, a\right )}}{b^{2}} \]
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Time = 0.04 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.53 \[ \int \sqrt {e^{a+b x}} x \, dx=\frac {2\,\sqrt {{\mathrm {e}}^{a+b\,x}}\,\left (b\,x-2\right )}{b^2} \]
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