Integrand size = 14, antiderivative size = 23 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=-2 \sqrt {1+\log (x)}+\frac {2}{3} (1+\log (x))^{3/2} \]
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Time = 0.03 (sec) , antiderivative size = 23, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {2412, 45} \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2}{3} (\log (x)+1)^{3/2}-2 \sqrt {\log (x)+1} \]
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Rule 45
Rule 2412
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \frac {x}{\sqrt {1+x}} \, dx,x,\log (x)\right ) \\ & = \text {Subst}\left (\int \left (-\frac {1}{\sqrt {1+x}}+\sqrt {1+x}\right ) \, dx,x,\log (x)\right ) \\ & = -2 \sqrt {1+\log (x)}+\frac {2}{3} (1+\log (x))^{3/2} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 16, normalized size of antiderivative = 0.70 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2}{3} (-2+\log (x)) \sqrt {1+\log (x)} \]
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Time = 0.05 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.78
method | result | size |
derivativedivides | \(\frac {2 \left (1+\ln \left (x \right )\right )^{\frac {3}{2}}}{3}-2 \sqrt {1+\ln \left (x \right )}\) | \(18\) |
default | \(\frac {2 \left (1+\ln \left (x \right )\right )^{\frac {3}{2}}}{3}-2 \sqrt {1+\ln \left (x \right )}\) | \(18\) |
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Time = 0.23 (sec) , antiderivative size = 12, normalized size of antiderivative = 0.52 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2}{3} \, \sqrt {\log \left (x\right ) + 1} {\left (\log \left (x\right ) - 2\right )} \]
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Time = 1.15 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.87 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2 \left (\log {\left (x \right )} + 1\right )^{\frac {3}{2}}}{3} - 2 \sqrt {\log {\left (x \right )} + 1} \]
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Time = 0.19 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.74 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2}{3} \, {\left (\log \left (x\right ) + 1\right )}^{\frac {3}{2}} - 2 \, \sqrt {\log \left (x\right ) + 1} \]
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Time = 0.26 (sec) , antiderivative size = 17, normalized size of antiderivative = 0.74 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\frac {2}{3} \, {\left (\log \left (x\right ) + 1\right )}^{\frac {3}{2}} - 2 \, \sqrt {\log \left (x\right ) + 1} \]
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Time = 0.18 (sec) , antiderivative size = 13, normalized size of antiderivative = 0.57 \[ \int \frac {\log (x)}{x \sqrt {1+\log (x)}} \, dx=\sqrt {\ln \left (x\right )+1}\,\left (\frac {2\,\ln \left (x\right )}{3}-\frac {4}{3}\right ) \]
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