Integrand size = 13, antiderivative size = 35 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=-\frac {\sqrt {-1+x}}{1+x}+\frac {\arctan \left (\frac {\sqrt {-1+x}}{\sqrt {2}}\right )}{\sqrt {2}} \]
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Time = 0.01 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {43, 65, 209} \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\frac {\arctan \left (\frac {\sqrt {x-1}}{\sqrt {2}}\right )}{\sqrt {2}}-\frac {\sqrt {x-1}}{x+1} \]
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Rule 43
Rule 65
Rule 209
Rubi steps \begin{align*} \text {integral}& = -\frac {\sqrt {-1+x}}{1+x}+\frac {1}{2} \int \frac {1}{\sqrt {-1+x} (1+x)} \, dx \\ & = -\frac {\sqrt {-1+x}}{1+x}+\text {Subst}\left (\int \frac {1}{2+x^2} \, dx,x,\sqrt {-1+x}\right ) \\ & = -\frac {\sqrt {-1+x}}{1+x}+\frac {\tan ^{-1}\left (\frac {\sqrt {-1+x}}{\sqrt {2}}\right )}{\sqrt {2}} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=-\frac {\sqrt {-1+x}}{1+x}+\frac {\arctan \left (\frac {\sqrt {-1+x}}{\sqrt {2}}\right )}{\sqrt {2}} \]
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Time = 0.26 (sec) , antiderivative size = 30, normalized size of antiderivative = 0.86
method | result | size |
derivativedivides | \(\frac {\arctan \left (\frac {\sqrt {-1+x}\, \sqrt {2}}{2}\right ) \sqrt {2}}{2}-\frac {\sqrt {-1+x}}{1+x}\) | \(30\) |
default | \(\frac {\arctan \left (\frac {\sqrt {-1+x}\, \sqrt {2}}{2}\right ) \sqrt {2}}{2}-\frac {\sqrt {-1+x}}{1+x}\) | \(30\) |
risch | \(\frac {\arctan \left (\frac {\sqrt {-1+x}\, \sqrt {2}}{2}\right ) \sqrt {2}}{2}-\frac {\sqrt {-1+x}}{1+x}\) | \(30\) |
trager | \(-\frac {\sqrt {-1+x}}{1+x}+\frac {\operatorname {RootOf}\left (\textit {\_Z}^{2}+2\right ) \ln \left (\frac {-\operatorname {RootOf}\left (\textit {\_Z}^{2}+2\right ) x +4 \sqrt {-1+x}+3 \operatorname {RootOf}\left (\textit {\_Z}^{2}+2\right )}{1+x}\right )}{4}\) | \(54\) |
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none
Time = 0.23 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.94 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\frac {\sqrt {2} {\left (x + 1\right )} \arctan \left (\frac {1}{2} \, \sqrt {2} \sqrt {x - 1}\right ) - 2 \, \sqrt {x - 1}}{2 \, {\left (x + 1\right )}} \]
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Result contains complex when optimal does not.
Time = 1.19 (sec) , antiderivative size = 105, normalized size of antiderivative = 3.00 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\begin {cases} \frac {\sqrt {2} i \operatorname {acosh}{\left (\frac {\sqrt {2}}{\sqrt {x + 1}} \right )}}{2} + \frac {i}{\sqrt {-1 + \frac {2}{x + 1}} \sqrt {x + 1}} - \frac {2 i}{\sqrt {-1 + \frac {2}{x + 1}} \left (x + 1\right )^{\frac {3}{2}}} & \text {for}\: \frac {1}{\left |{x + 1}\right |} > \frac {1}{2} \\- \frac {\sqrt {1 - \frac {2}{x + 1}}}{\sqrt {x + 1}} - \frac {\sqrt {2} \operatorname {asin}{\left (\frac {\sqrt {2}}{\sqrt {x + 1}} \right )}}{2} & \text {otherwise} \end {cases} \]
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none
Time = 0.28 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.83 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\frac {1}{2} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} \sqrt {x - 1}\right ) - \frac {\sqrt {x - 1}}{x + 1} \]
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none
Time = 0.32 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.83 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\frac {1}{2} \, \sqrt {2} \arctan \left (\frac {1}{2} \, \sqrt {2} \sqrt {x - 1}\right ) - \frac {\sqrt {x - 1}}{x + 1} \]
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Time = 0.06 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.83 \[ \int \frac {\sqrt {-1+x}}{(1+x)^2} \, dx=\frac {\sqrt {2}\,\mathrm {atan}\left (\frac {\sqrt {2}\,\sqrt {x-1}}{2}\right )}{2}-\frac {\sqrt {x-1}}{x+1} \]
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