Integrand size = 19, antiderivative size = 20 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=\text {arctanh}\left (\frac {e^x}{\sqrt {-a^2+e^{2 x}}}\right ) \]
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Time = 0.02 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.158, Rules used = {2281, 223, 212} \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=\text {arctanh}\left (\frac {e^x}{\sqrt {e^{2 x}-a^2}}\right ) \]
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Rule 212
Rule 223
Rule 2281
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \frac {1}{\sqrt {-a^2+x^2}} \, dx,x,e^x\right ) \\ & = \text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {e^x}{\sqrt {-a^2+e^{2 x}}}\right ) \\ & = \text {arctanh}\left (\frac {e^x}{\sqrt {-a^2+e^{2 x}}}\right ) \\ \end{align*}
Time = 0.03 (sec) , antiderivative size = 24, normalized size of antiderivative = 1.20 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=-\log \left (-e^x+\sqrt {-a^2+e^{2 x}}\right ) \]
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Time = 0.04 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.85
method | result | size |
default | \(\ln \left ({\mathrm e}^{x}+\sqrt {-a^{2}+{\mathrm e}^{2 x}}\right )\) | \(17\) |
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Time = 0.24 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.00 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=-\log \left (\sqrt {-a^{2} + e^{\left (2 \, x\right )}} - e^{x}\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 37 vs. \(2 (15) = 30\).
Time = 0.27 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.85 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=\begin {cases} \log {\left (2 \sqrt {- a^{2} + e^{2 x}} + 2 e^{x} \right )} & \text {for}\: a^{2} \neq 0 \\\frac {e^{x} \log {\left (e^{x} \right )}}{\sqrt {e^{2 x}}} & \text {otherwise} \end {cases} \]
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Time = 0.20 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.00 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=\log \left (2 \, \sqrt {-a^{2} + e^{\left (2 \, x\right )}} + 2 \, e^{x}\right ) \]
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Time = 0.28 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.00 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=-\log \left (-\sqrt {-a^{2} + e^{\left (2 \, x\right )}} + e^{x}\right ) \]
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Time = 0.52 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.80 \[ \int \frac {e^x}{\sqrt {-a^2+e^{2 x}}} \, dx=\ln \left ({\mathrm {e}}^x+\sqrt {{\mathrm {e}}^{2\,x}-a^2}\right ) \]
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