Integrand size = 13, antiderivative size = 14 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\text {arctanh}\left (\frac {\sqrt {2+x}}{2}\right ) \]
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Time = 0.00 (sec) , antiderivative size = 14, 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 = {65, 213} \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\text {arctanh}\left (\frac {\sqrt {x+2}}{2}\right ) \]
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Rule 65
Rule 213
Rubi steps \begin{align*} \text {integral}& = 2 \text {Subst}\left (\int \frac {1}{-4+x^2} \, dx,x,\sqrt {2+x}\right ) \\ & = -\tanh ^{-1}\left (\frac {\sqrt {2+x}}{2}\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 14, normalized size of antiderivative = 1.00 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\text {arctanh}\left (\frac {\sqrt {2+x}}{2}\right ) \]
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Time = 0.48 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.50
method | result | size |
trager | \(-\frac {\ln \left (-\frac {6+x +4 \sqrt {2+x}}{-2+x}\right )}{2}\) | \(21\) |
derivativedivides | \(-\frac {\ln \left (\sqrt {2+x}+2\right )}{2}+\frac {\ln \left (\sqrt {2+x}-2\right )}{2}\) | \(22\) |
default | \(-\frac {\ln \left (\sqrt {2+x}+2\right )}{2}+\frac {\ln \left (\sqrt {2+x}-2\right )}{2}\) | \(22\) |
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Leaf count of result is larger than twice the leaf count of optimal. 21 vs. \(2 (10) = 20\).
Time = 0.22 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.50 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\frac {1}{2} \, \log \left (\sqrt {x + 2} + 2\right ) + \frac {1}{2} \, \log \left (\sqrt {x + 2} - 2\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 26 vs. \(2 (10) = 20\).
Time = 0.44 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.86 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=\begin {cases} - \operatorname {acoth}{\left (\frac {\sqrt {x + 2}}{2} \right )} & \text {for}\: \left |{x + 2}\right | > 4 \\- \operatorname {atanh}{\left (\frac {\sqrt {x + 2}}{2} \right )} & \text {otherwise} \end {cases} \]
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Leaf count of result is larger than twice the leaf count of optimal. 21 vs. \(2 (10) = 20\).
Time = 0.22 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.50 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\frac {1}{2} \, \log \left (\sqrt {x + 2} + 2\right ) + \frac {1}{2} \, \log \left (\sqrt {x + 2} - 2\right ) \]
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Leaf count of result is larger than twice the leaf count of optimal. 22 vs. \(2 (10) = 20\).
Time = 0.31 (sec) , antiderivative size = 22, normalized size of antiderivative = 1.57 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\frac {1}{2} \, \log \left (\sqrt {x + 2} + 2\right ) + \frac {1}{2} \, \log \left ({\left | \sqrt {x + 2} - 2 \right |}\right ) \]
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Time = 0.05 (sec) , antiderivative size = 10, normalized size of antiderivative = 0.71 \[ \int \frac {1}{(-2+x) \sqrt {2+x}} \, dx=-\mathrm {atanh}\left (\frac {\sqrt {x+2}}{2}\right ) \]
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