Integrand size = 10, antiderivative size = 12 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\text {arcsinh}\left (\frac {1+2 x}{\sqrt {3}}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 12, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {633, 221} \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\text {arcsinh}\left (\frac {2 x+1}{\sqrt {3}}\right ) \]
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Rule 221
Rule 633
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {1}{\sqrt {1+\frac {x^2}{3}}} \, dx,x,1+2 x\right )}{\sqrt {3}} \\ & = \text {arcsinh}\left (\frac {1+2 x}{\sqrt {3}}\right ) \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 20, normalized size of antiderivative = 1.67 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=-\log \left (-1-2 x+2 \sqrt {1+x+x^2}\right ) \]
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Time = 0.41 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.83
method | result | size |
default | \(\operatorname {arcsinh}\left (\frac {2 \sqrt {3}\, \left (x +\frac {1}{2}\right )}{3}\right )\) | \(10\) |
trager | \(-\ln \left (2 \sqrt {x^{2}+x +1}-1-2 x \right )\) | \(19\) |
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none
Time = 0.24 (sec) , antiderivative size = 18, normalized size of antiderivative = 1.50 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=-\log \left (-2 \, x + 2 \, \sqrt {x^{2} + x + 1} - 1\right ) \]
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Time = 0.20 (sec) , antiderivative size = 14, normalized size of antiderivative = 1.17 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\operatorname {asinh}{\left (\frac {2 \sqrt {3} \left (x + \frac {1}{2}\right )}{3} \right )} \]
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none
Time = 0.27 (sec) , antiderivative size = 11, normalized size of antiderivative = 0.92 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\operatorname {arsinh}\left (\frac {1}{3} \, \sqrt {3} {\left (2 \, x + 1\right )}\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 34 vs. \(2 (11) = 22\).
Time = 0.30 (sec) , antiderivative size = 34, normalized size of antiderivative = 2.83 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\frac {1}{4} \, \sqrt {x^{2} + x + 1} {\left (2 \, x + 1\right )} - \frac {3}{8} \, \log \left (-2 \, x + 2 \, \sqrt {x^{2} + x + 1} - 1\right ) \]
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Time = 0.27 (sec) , antiderivative size = 12, normalized size of antiderivative = 1.00 \[ \int \frac {1}{\sqrt {1+x+x^2}} \, dx=\ln \left (x+\sqrt {x^2+x+1}+\frac {1}{2}\right ) \]
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