Integrand size = 15, antiderivative size = 84 \[ \int x^{3/2} \sqrt {2+b x} \, dx=-\frac {\sqrt {x} \sqrt {2+b x}}{2 b^2}+\frac {x^{3/2} \sqrt {2+b x}}{6 b}+\frac {1}{3} x^{5/2} \sqrt {2+b x}+\frac {\text {arcsinh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )}{b^{5/2}} \]
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Time = 0.02 (sec) , antiderivative size = 84, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {52, 56, 221} \[ \int x^{3/2} \sqrt {2+b x} \, dx=\frac {\text {arcsinh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )}{b^{5/2}}-\frac {\sqrt {x} \sqrt {b x+2}}{2 b^2}+\frac {1}{3} x^{5/2} \sqrt {b x+2}+\frac {x^{3/2} \sqrt {b x+2}}{6 b} \]
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Rule 52
Rule 56
Rule 221
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} x^{5/2} \sqrt {2+b x}+\frac {1}{3} \int \frac {x^{3/2}}{\sqrt {2+b x}} \, dx \\ & = \frac {x^{3/2} \sqrt {2+b x}}{6 b}+\frac {1}{3} x^{5/2} \sqrt {2+b x}-\frac {\int \frac {\sqrt {x}}{\sqrt {2+b x}} \, dx}{2 b} \\ & = -\frac {\sqrt {x} \sqrt {2+b x}}{2 b^2}+\frac {x^{3/2} \sqrt {2+b x}}{6 b}+\frac {1}{3} x^{5/2} \sqrt {2+b x}+\frac {\int \frac {1}{\sqrt {x} \sqrt {2+b x}} \, dx}{2 b^2} \\ & = -\frac {\sqrt {x} \sqrt {2+b x}}{2 b^2}+\frac {x^{3/2} \sqrt {2+b x}}{6 b}+\frac {1}{3} x^{5/2} \sqrt {2+b x}+\frac {\text {Subst}\left (\int \frac {1}{\sqrt {2+b x^2}} \, dx,x,\sqrt {x}\right )}{b^2} \\ & = -\frac {\sqrt {x} \sqrt {2+b x}}{2 b^2}+\frac {x^{3/2} \sqrt {2+b x}}{6 b}+\frac {1}{3} x^{5/2} \sqrt {2+b x}+\frac {\sinh ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )}{b^{5/2}} \\ \end{align*}
Time = 0.23 (sec) , antiderivative size = 73, normalized size of antiderivative = 0.87 \[ \int x^{3/2} \sqrt {2+b x} \, dx=\frac {\sqrt {x} \sqrt {2+b x} \left (-3+b x+2 b^2 x^2\right )}{6 b^2}-\frac {2 \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}-\sqrt {2+b x}}\right )}{b^{5/2}} \]
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Time = 0.07 (sec) , antiderivative size = 63, normalized size of antiderivative = 0.75
method | result | size |
meijerg | \(-\frac {4 \left (\frac {\sqrt {\pi }\, \sqrt {x}\, \sqrt {2}\, \sqrt {b}\, \left (-10 b^{2} x^{2}-5 b x +15\right ) \sqrt {\frac {b x}{2}+1}}{120}-\frac {\sqrt {\pi }\, \operatorname {arcsinh}\left (\frac {\sqrt {b}\, \sqrt {x}\, \sqrt {2}}{2}\right )}{4}\right )}{b^{\frac {5}{2}} \sqrt {\pi }}\) | \(63\) |
risch | \(\frac {\left (2 b^{2} x^{2}+b x -3\right ) \sqrt {x}\, \sqrt {b x +2}}{6 b^{2}}+\frac {\ln \left (\frac {b x +1}{\sqrt {b}}+\sqrt {b \,x^{2}+2 x}\right ) \sqrt {x \left (b x +2\right )}}{2 b^{\frac {5}{2}} \sqrt {x}\, \sqrt {b x +2}}\) | \(76\) |
default | \(\frac {x^{\frac {3}{2}} \left (b x +2\right )^{\frac {3}{2}}}{3 b}-\frac {\frac {\sqrt {x}\, \left (b x +2\right )^{\frac {3}{2}}}{2 b}-\frac {\sqrt {x}\, \sqrt {b x +2}+\frac {\sqrt {x \left (b x +2\right )}\, \ln \left (\frac {b x +1}{\sqrt {b}}+\sqrt {b \,x^{2}+2 x}\right )}{\sqrt {b x +2}\, \sqrt {x}\, \sqrt {b}}}{2 b}}{b}\) | \(100\) |
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Time = 0.23 (sec) , antiderivative size = 121, normalized size of antiderivative = 1.44 \[ \int x^{3/2} \sqrt {2+b x} \, dx=\left [\frac {{\left (2 \, b^{3} x^{2} + b^{2} x - 3 \, b\right )} \sqrt {b x + 2} \sqrt {x} + 3 \, \sqrt {b} \log \left (b x + \sqrt {b x + 2} \sqrt {b} \sqrt {x} + 1\right )}{6 \, b^{3}}, \frac {{\left (2 \, b^{3} x^{2} + b^{2} x - 3 \, b\right )} \sqrt {b x + 2} \sqrt {x} - 6 \, \sqrt {-b} \arctan \left (\frac {\sqrt {b x + 2} \sqrt {-b}}{b \sqrt {x}}\right )}{6 \, b^{3}}\right ] \]
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Time = 5.44 (sec) , antiderivative size = 90, normalized size of antiderivative = 1.07 \[ \int x^{3/2} \sqrt {2+b x} \, dx=\frac {b x^{\frac {7}{2}}}{3 \sqrt {b x + 2}} + \frac {5 x^{\frac {5}{2}}}{6 \sqrt {b x + 2}} - \frac {x^{\frac {3}{2}}}{6 b \sqrt {b x + 2}} - \frac {\sqrt {x}}{b^{2} \sqrt {b x + 2}} + \frac {\operatorname {asinh}{\left (\frac {\sqrt {2} \sqrt {b} \sqrt {x}}{2} \right )}}{b^{\frac {5}{2}}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 134 vs. \(2 (59) = 118\).
Time = 0.30 (sec) , antiderivative size = 134, normalized size of antiderivative = 1.60 \[ \int x^{3/2} \sqrt {2+b x} \, dx=-\frac {\frac {3 \, \sqrt {b x + 2} b^{2}}{\sqrt {x}} + \frac {8 \, {\left (b x + 2\right )}^{\frac {3}{2}} b}{x^{\frac {3}{2}}} - \frac {3 \, {\left (b x + 2\right )}^{\frac {5}{2}}}{x^{\frac {5}{2}}}}{3 \, {\left (b^{5} - \frac {3 \, {\left (b x + 2\right )} b^{4}}{x} + \frac {3 \, {\left (b x + 2\right )}^{2} b^{3}}{x^{2}} - \frac {{\left (b x + 2\right )}^{3} b^{2}}{x^{3}}\right )}} - \frac {\log \left (-\frac {\sqrt {b} - \frac {\sqrt {b x + 2}}{\sqrt {x}}}{\sqrt {b} + \frac {\sqrt {b x + 2}}{\sqrt {x}}}\right )}{2 \, b^{\frac {5}{2}}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 162 vs. \(2 (59) = 118\).
Time = 11.25 (sec) , antiderivative size = 162, normalized size of antiderivative = 1.93 \[ \int x^{3/2} \sqrt {2+b x} \, dx=\frac {\frac {{\left (\sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} {\left ({\left (b x + 2\right )} {\left (\frac {2 \, {\left (b x + 2\right )}}{b^{2}} - \frac {13}{b^{2}}\right )} + \frac {33}{b^{2}}\right )} + \frac {30 \, \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )}{b^{\frac {3}{2}}}\right )} {\left | b \right |}}{b} + \frac {6 \, {\left (\sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} {\left (b x - 3\right )} - 6 \, \sqrt {b} \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )\right )} {\left | b \right |}}{b^{3}}}{6 \, b} \]
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Timed out. \[ \int x^{3/2} \sqrt {2+b x} \, dx=\int x^{3/2}\,\sqrt {b\,x+2} \,d x \]
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