Integrand size = 12, antiderivative size = 8 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\text {arcsinh}\left (\frac {2+x}{2}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 8, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {633, 221} \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\text {arcsinh}\left (\frac {x+2}{2}\right ) \]
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Rule 221
Rule 633
Rubi steps \begin{align*} \text {integral}& = \frac {1}{4} \text {Subst}\left (\int \frac {1}{\sqrt {1+\frac {x^2}{16}}} \, dx,x,4+2 x\right ) \\ & = \text {arcsinh}\left (\frac {2+x}{2}\right ) \\ \end{align*}
Leaf count is larger than twice the leaf count of optimal. \(20\) vs. \(2(8)=16\).
Time = 0.07 (sec) , antiderivative size = 20, normalized size of antiderivative = 2.50 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=-\log \left (-2-x+\sqrt {8+4 x+x^2}\right ) \]
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Time = 0.24 (sec) , antiderivative size = 7, normalized size of antiderivative = 0.88
method | result | size |
default | \(\operatorname {arcsinh}\left (1+\frac {x}{2}\right )\) | \(7\) |
trager | \(\ln \left (x +2+\sqrt {x^{2}+4 x +8}\right )\) | \(15\) |
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Leaf count of result is larger than twice the leaf count of optimal. 18 vs. \(2 (6) = 12\).
Time = 0.24 (sec) , antiderivative size = 18, normalized size of antiderivative = 2.25 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=-\log \left (-x + \sqrt {x^{2} + 4 \, x + 8} - 2\right ) \]
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Time = 0.28 (sec) , antiderivative size = 5, normalized size of antiderivative = 0.62 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\operatorname {asinh}{\left (\frac {x}{2} + 1 \right )} \]
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none
Time = 0.37 (sec) , antiderivative size = 6, normalized size of antiderivative = 0.75 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\operatorname {arsinh}\left (\frac {1}{2} \, x + 1\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 34 vs. \(2 (6) = 12\).
Time = 0.29 (sec) , antiderivative size = 34, normalized size of antiderivative = 4.25 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\frac {1}{2} \, \sqrt {x^{2} + 4 \, x + 8} {\left (x + 2\right )} - 2 \, \log \left (-x + \sqrt {x^{2} + 4 \, x + 8} - 2\right ) \]
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Time = 0.25 (sec) , antiderivative size = 14, normalized size of antiderivative = 1.75 \[ \int \frac {1}{\sqrt {8+4 x+x^2}} \, dx=\ln \left (x+\sqrt {x^2+4\,x+8}+2\right ) \]
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