Integrand size = 16, antiderivative size = 36 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=-\frac {2 \text {arctanh}\left (\frac {a+2 c e^x}{\sqrt {a^2-4 b c}}\right )}{\sqrt {a^2-4 b c}} \]
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Time = 0.04 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {2320, 1400, 632, 212} \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=-\frac {2 \text {arctanh}\left (\frac {a+2 c e^x}{\sqrt {a^2-4 b c}}\right )}{\sqrt {a^2-4 b c}} \]
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Rule 212
Rule 632
Rule 1400
Rule 2320
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \frac {1}{x \left (a+\frac {b}{x}+c x\right )} \, dx,x,e^x\right ) \\ & = \text {Subst}\left (\int \frac {1}{b+a x+c x^2} \, dx,x,e^x\right ) \\ & = -\left (2 \text {Subst}\left (\int \frac {1}{a^2-4 b c-x^2} \, dx,x,a+2 c e^x\right )\right ) \\ & = -\frac {2 \tanh ^{-1}\left (\frac {a+2 c e^x}{\sqrt {a^2-4 b c}}\right )}{\sqrt {a^2-4 b c}} \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.11 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\frac {2 \arctan \left (\frac {a+2 c e^x}{\sqrt {-a^2+4 b c}}\right )}{\sqrt {-a^2+4 b c}} \]
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Time = 0.03 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.00
method | result | size |
derivativedivides | \(\frac {2 \arctan \left (\frac {a +2 c \,{\mathrm e}^{x}}{\sqrt {-a^{2}+4 c b}}\right )}{\sqrt {-a^{2}+4 c b}}\) | \(36\) |
default | \(\frac {2 \arctan \left (\frac {a +2 c \,{\mathrm e}^{x}}{\sqrt {-a^{2}+4 c b}}\right )}{\sqrt {-a^{2}+4 c b}}\) | \(36\) |
risch | \(\frac {\ln \left ({\mathrm e}^{x}+\frac {a \sqrt {a^{2}-4 c b}-a^{2}+4 c b}{2 c \sqrt {a^{2}-4 c b}}\right )}{\sqrt {a^{2}-4 c b}}-\frac {\ln \left ({\mathrm e}^{x}+\frac {a \sqrt {a^{2}-4 c b}+a^{2}-4 c b}{2 c \sqrt {a^{2}-4 c b}}\right )}{\sqrt {a^{2}-4 c b}}\) | \(105\) |
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none
Time = 0.36 (sec) , antiderivative size = 126, normalized size of antiderivative = 3.50 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\left [\frac {\log \left (\frac {2 \, c^{2} e^{\left (2 \, x\right )} + 2 \, a c e^{x} + a^{2} - 2 \, b c - \sqrt {a^{2} - 4 \, b c} {\left (2 \, c e^{x} + a\right )}}{c e^{\left (2 \, x\right )} + a e^{x} + b}\right )}{\sqrt {a^{2} - 4 \, b c}}, -\frac {2 \, \sqrt {-a^{2} + 4 \, b c} \arctan \left (-\frac {\sqrt {-a^{2} + 4 \, b c} {\left (2 \, c e^{x} + a\right )}}{a^{2} - 4 \, b c}\right )}{a^{2} - 4 \, b c}\right ] \]
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Time = 0.15 (sec) , antiderivative size = 36, normalized size of antiderivative = 1.00 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\operatorname {RootSum} {\left (z^{2} \left (a^{2} - 4 b c\right ) - 1, \left ( i \mapsto i \log {\left (e^{x} + \frac {- i a^{2} + 4 i b c + a}{2 c} \right )} \right )\right )} \]
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Exception generated. \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\text {Exception raised: ValueError} \]
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Time = 0.28 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.97 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\frac {2 \, \arctan \left (\frac {2 \, c e^{x} + a}{\sqrt {-a^{2} + 4 \, b c}}\right )}{\sqrt {-a^{2} + 4 \, b c}} \]
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Time = 0.20 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.97 \[ \int \frac {1}{a+b e^{-x}+c e^x} \, dx=\frac {2\,\mathrm {atan}\left (\frac {a+2\,c\,{\mathrm {e}}^x}{\sqrt {4\,b\,c-a^2}}\right )}{\sqrt {4\,b\,c-a^2}} \]
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