Integrand size = 15, antiderivative size = 96 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=-\frac {2 x^{5/2}}{b \sqrt {a+b x}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}+\frac {15 a^2 \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{4 b^{7/2}} \]
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Time = 0.02 (sec) , antiderivative size = 96, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {49, 52, 65, 223, 212} \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=\frac {15 a^2 \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{4 b^{7/2}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}-\frac {2 x^{5/2}}{b \sqrt {a+b x}} \]
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Rule 49
Rule 52
Rule 65
Rule 212
Rule 223
Rubi steps \begin{align*} \text {integral}& = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}+\frac {5 \int \frac {x^{3/2}}{\sqrt {a+b x}} \, dx}{b} \\ & = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}-\frac {(15 a) \int \frac {\sqrt {x}}{\sqrt {a+b x}} \, dx}{4 b^2} \\ & = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}+\frac {\left (15 a^2\right ) \int \frac {1}{\sqrt {x} \sqrt {a+b x}} \, dx}{8 b^3} \\ & = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}+\frac {\left (15 a^2\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a+b x^2}} \, dx,x,\sqrt {x}\right )}{4 b^3} \\ & = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}+\frac {\left (15 a^2\right ) \text {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {a+b x}}\right )}{4 b^3} \\ & = -\frac {2 x^{5/2}}{b \sqrt {a+b x}}-\frac {15 a \sqrt {x} \sqrt {a+b x}}{4 b^3}+\frac {5 x^{3/2} \sqrt {a+b x}}{2 b^2}+\frac {15 a^2 \tanh ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a+b x}}\right )}{4 b^{7/2}} \\ \end{align*}
Time = 0.23 (sec) , antiderivative size = 84, normalized size of antiderivative = 0.88 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=\frac {\sqrt {x} \left (-15 a^2-5 a b x+2 b^2 x^2\right )}{4 b^3 \sqrt {a+b x}}+\frac {15 a^2 \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{-\sqrt {a}+\sqrt {a+b x}}\right )}{2 b^{7/2}} \]
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Time = 0.10 (sec) , antiderivative size = 119, normalized size of antiderivative = 1.24
method | result | size |
risch | \(-\frac {\left (-2 b x +7 a \right ) \sqrt {x}\, \sqrt {b x +a}}{4 b^{3}}+\frac {\left (\frac {15 a^{2} \ln \left (\frac {\frac {a}{2}+b x}{\sqrt {b}}+\sqrt {b \,x^{2}+a x}\right )}{8 b^{\frac {7}{2}}}-\frac {2 a^{2} \sqrt {b \left (x +\frac {a}{b}\right )^{2}-\left (x +\frac {a}{b}\right ) a}}{b^{4} \left (x +\frac {a}{b}\right )}\right ) \sqrt {x \left (b x +a \right )}}{\sqrt {x}\, \sqrt {b x +a}}\) | \(119\) |
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Time = 0.23 (sec) , antiderivative size = 175, normalized size of antiderivative = 1.82 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=\left [\frac {15 \, {\left (a^{2} b x + a^{3}\right )} \sqrt {b} \log \left (2 \, b x + 2 \, \sqrt {b x + a} \sqrt {b} \sqrt {x} + a\right ) + 2 \, {\left (2 \, b^{3} x^{2} - 5 \, a b^{2} x - 15 \, a^{2} b\right )} \sqrt {b x + a} \sqrt {x}}{8 \, {\left (b^{5} x + a b^{4}\right )}}, -\frac {15 \, {\left (a^{2} b x + a^{3}\right )} \sqrt {-b} \arctan \left (\frac {\sqrt {b x + a} \sqrt {-b}}{b \sqrt {x}}\right ) - {\left (2 \, b^{3} x^{2} - 5 \, a b^{2} x - 15 \, a^{2} b\right )} \sqrt {b x + a} \sqrt {x}}{4 \, {\left (b^{5} x + a b^{4}\right )}}\right ] \]
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Time = 6.03 (sec) , antiderivative size = 105, normalized size of antiderivative = 1.09 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=- \frac {15 a^{\frac {3}{2}} \sqrt {x}}{4 b^{3} \sqrt {1 + \frac {b x}{a}}} - \frac {5 \sqrt {a} x^{\frac {3}{2}}}{4 b^{2} \sqrt {1 + \frac {b x}{a}}} + \frac {15 a^{2} \operatorname {asinh}{\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a}} \right )}}{4 b^{\frac {7}{2}}} + \frac {x^{\frac {5}{2}}}{2 \sqrt {a} b \sqrt {1 + \frac {b x}{a}}} \]
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Time = 0.33 (sec) , antiderivative size = 131, normalized size of antiderivative = 1.36 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=-\frac {8 \, a^{2} b^{2} - \frac {25 \, {\left (b x + a\right )} a^{2} b}{x} + \frac {15 \, {\left (b x + a\right )}^{2} a^{2}}{x^{2}}}{4 \, {\left (\frac {\sqrt {b x + a} b^{5}}{\sqrt {x}} - \frac {2 \, {\left (b x + a\right )}^{\frac {3}{2}} b^{4}}{x^{\frac {3}{2}}} + \frac {{\left (b x + a\right )}^{\frac {5}{2}} b^{3}}{x^{\frac {5}{2}}}\right )}} - \frac {15 \, a^{2} \log \left (-\frac {\sqrt {b} - \frac {\sqrt {b x + a}}{\sqrt {x}}}{\sqrt {b} + \frac {\sqrt {b x + a}}{\sqrt {x}}}\right )}{8 \, b^{\frac {7}{2}}} \]
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Time = 15.82 (sec) , antiderivative size = 131, normalized size of antiderivative = 1.36 \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=\frac {{\left (2 \, \sqrt {{\left (b x + a\right )} b - a b} \sqrt {b x + a} {\left (\frac {2 \, {\left (b x + a\right )}}{b^{3}} - \frac {9 \, a}{b^{3}}\right )} - \frac {32 \, a^{3}}{{\left ({\left (\sqrt {b x + a} \sqrt {b} - \sqrt {{\left (b x + a\right )} b - a b}\right )}^{2} + a b\right )} b^{\frac {3}{2}}} - \frac {15 \, a^{2} \log \left ({\left (\sqrt {b x + a} \sqrt {b} - \sqrt {{\left (b x + a\right )} b - a b}\right )}^{2}\right )}{b^{\frac {5}{2}}}\right )} {\left | b \right |}}{8 \, b^{2}} \]
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Timed out. \[ \int \frac {x^{5/2}}{(a+b x)^{3/2}} \, dx=\int \frac {x^{5/2}}{{\left (a+b\,x\right )}^{3/2}} \,d x \]
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