Integrand size = 14, antiderivative size = 26 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=\sqrt {1+x^2}+x \log \left (x-\sqrt {1+x^2}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {2614, 267} \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=\sqrt {x^2+1}+x \log \left (x-\sqrt {x^2+1}\right ) \]
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Rule 267
Rule 2614
Rubi steps \begin{align*} \text {integral}& = x \log \left (x-\sqrt {1+x^2}\right )+\int \frac {x}{\sqrt {1+x^2}} \, dx \\ & = \sqrt {1+x^2}+x \log \left (x-\sqrt {1+x^2}\right ) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 26, normalized size of antiderivative = 1.00 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=\sqrt {1+x^2}+x \log \left (x-\sqrt {1+x^2}\right ) \]
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Time = 0.02 (sec) , antiderivative size = 23, normalized size of antiderivative = 0.88
method | result | size |
default | \(x \ln \left (-\sqrt {x^{2}+1}+x \right )+\sqrt {x^{2}+1}\) | \(23\) |
parts | \(x \ln \left (-\sqrt {x^{2}+1}+x \right )-\frac {x^{2} \sqrt {x^{2}+1}}{3}+\frac {2 \sqrt {x^{2}+1}}{3}+\frac {\left (x^{2}+1\right )^{\frac {3}{2}}}{3}\) | \(46\) |
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none
Time = 0.25 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.85 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=x \log \left (x - \sqrt {x^{2} + 1}\right ) + \sqrt {x^{2} + 1} \]
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Time = 2.61 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.77 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=x \log {\left (x - \sqrt {x^{2} + 1} \right )} + \sqrt {x^{2} + 1} \]
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\[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=\int { \log \left (x - \sqrt {x^{2} + 1}\right ) \,d x } \]
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none
Time = 0.31 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.85 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=x \log \left (x - \sqrt {x^{2} + 1}\right ) + \sqrt {x^{2} + 1} \]
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Time = 0.08 (sec) , antiderivative size = 22, normalized size of antiderivative = 0.85 \[ \int \log \left (x-\sqrt {1+x^2}\right ) \, dx=x\,\ln \left (x-\sqrt {x^2+1}\right )+\sqrt {x^2+1} \]
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