Integrand size = 17, antiderivative size = 94 \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=-\frac {5}{8} a (a+2 b x) \sqrt {a x+b x^2}-\frac {5}{3} b \left (a x+b x^2\right )^{3/2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}+\frac {5 a^3 \text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {a x+b x^2}}\right )}{8 \sqrt {b}} \]
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Time = 0.03 (sec) , antiderivative size = 94, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.294, Rules used = {676, 678, 626, 634, 212} \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\frac {5 a^3 \text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {a x+b x^2}}\right )}{8 \sqrt {b}}-\frac {5}{8} a (a+2 b x) \sqrt {a x+b x^2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}-\frac {5}{3} b \left (a x+b x^2\right )^{3/2} \]
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Rule 212
Rule 626
Rule 634
Rule 676
Rule 678
Rubi steps \begin{align*} \text {integral}& = \frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}-(5 b) \int \frac {\left (a x+b x^2\right )^{3/2}}{x} \, dx \\ & = -\frac {5}{3} b \left (a x+b x^2\right )^{3/2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}-\frac {1}{2} (5 a b) \int \sqrt {a x+b x^2} \, dx \\ & = -\frac {5}{8} a (a+2 b x) \sqrt {a x+b x^2}-\frac {5}{3} b \left (a x+b x^2\right )^{3/2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}+\frac {1}{16} \left (5 a^3\right ) \int \frac {1}{\sqrt {a x+b x^2}} \, dx \\ & = -\frac {5}{8} a (a+2 b x) \sqrt {a x+b x^2}-\frac {5}{3} b \left (a x+b x^2\right )^{3/2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}+\frac {1}{8} \left (5 a^3\right ) \text {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {x}{\sqrt {a x+b x^2}}\right ) \\ & = -\frac {5}{8} a (a+2 b x) \sqrt {a x+b x^2}-\frac {5}{3} b \left (a x+b x^2\right )^{3/2}+\frac {2 \left (a x+b x^2\right )^{5/2}}{x^2}+\frac {5 a^3 \tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a x+b x^2}}\right )}{8 \sqrt {b}} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 81, normalized size of antiderivative = 0.86 \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\frac {1}{24} \sqrt {x (a+b x)} \left (33 a^2+26 a b x+8 b^2 x^2-\frac {15 a^3 \log \left (-\sqrt {b} \sqrt {x}+\sqrt {a+b x}\right )}{\sqrt {b} \sqrt {x} \sqrt {a+b x}}\right ) \]
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Time = 2.05 (sec) , antiderivative size = 64, normalized size of antiderivative = 0.68
method | result | size |
pseudoelliptic | \(\frac {5 \,\operatorname {arctanh}\left (\frac {\sqrt {x \left (b x +a \right )}}{x \sqrt {b}}\right ) a^{3}}{8 \sqrt {b}}+\frac {11 \left (\sqrt {b}\, a^{2}+\frac {26 b^{\frac {3}{2}} a x}{33}+\frac {8 b^{\frac {5}{2}} x^{2}}{33}\right ) \sqrt {x \left (b x +a \right )}}{8 \sqrt {b}}\) | \(64\) |
risch | \(\frac {\left (8 b^{2} x^{2}+26 a b x +33 a^{2}\right ) x \left (b x +a \right )}{24 \sqrt {x \left (b x +a \right )}}+\frac {5 a^{3} \ln \left (\frac {\frac {a}{2}+b x}{\sqrt {b}}+\sqrt {b \,x^{2}+a x}\right )}{16 \sqrt {b}}\) | \(70\) |
default | \(\frac {2 \left (b \,x^{2}+a x \right )^{\frac {7}{2}}}{a \,x^{3}}-\frac {8 b \left (\frac {2 \left (b \,x^{2}+a x \right )^{\frac {7}{2}}}{3 a \,x^{2}}-\frac {10 b \left (\frac {\left (b \,x^{2}+a x \right )^{\frac {5}{2}}}{5}+\frac {a \left (\frac {\left (2 b x +a \right ) \left (b \,x^{2}+a x \right )^{\frac {3}{2}}}{8 b}-\frac {3 a^{2} \left (\frac {\left (2 b x +a \right ) \sqrt {b \,x^{2}+a x}}{4 b}-\frac {a^{2} \ln \left (\frac {\frac {a}{2}+b x}{\sqrt {b}}+\sqrt {b \,x^{2}+a x}\right )}{8 b^{\frac {3}{2}}}\right )}{16 b}\right )}{2}\right )}{3 a}\right )}{a}\) | \(156\) |
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Time = 0.26 (sec) , antiderivative size = 148, normalized size of antiderivative = 1.57 \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\left [\frac {15 \, a^{3} \sqrt {b} \log \left (2 \, b x + a + 2 \, \sqrt {b x^{2} + a x} \sqrt {b}\right ) + 2 \, {\left (8 \, b^{3} x^{2} + 26 \, a b^{2} x + 33 \, a^{2} b\right )} \sqrt {b x^{2} + a x}}{48 \, b}, -\frac {15 \, a^{3} \sqrt {-b} \arctan \left (\frac {\sqrt {b x^{2} + a x} \sqrt {-b}}{b x}\right ) - {\left (8 \, b^{3} x^{2} + 26 \, a b^{2} x + 33 \, a^{2} b\right )} \sqrt {b x^{2} + a x}}{24 \, b}\right ] \]
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\[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\int \frac {\left (x \left (a + b x\right )\right )^{\frac {5}{2}}}{x^{3}}\, dx \]
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Time = 0.18 (sec) , antiderivative size = 81, normalized size of antiderivative = 0.86 \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\frac {5 \, a^{3} \log \left (2 \, b x + a + 2 \, \sqrt {b x^{2} + a x} \sqrt {b}\right )}{16 \, \sqrt {b}} + \frac {5}{8} \, \sqrt {b x^{2} + a x} a^{2} + \frac {5 \, {\left (b x^{2} + a x\right )}^{\frac {3}{2}} a}{12 \, x} + \frac {{\left (b x^{2} + a x\right )}^{\frac {5}{2}}}{3 \, x^{2}} \]
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Time = 0.29 (sec) , antiderivative size = 70, normalized size of antiderivative = 0.74 \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=-\frac {5 \, a^{3} \log \left ({\left | 2 \, {\left (\sqrt {b} x - \sqrt {b x^{2} + a x}\right )} \sqrt {b} + a \right |}\right )}{16 \, \sqrt {b}} + \frac {1}{24} \, \sqrt {b x^{2} + a x} {\left (33 \, a^{2} + 2 \, {\left (4 \, b^{2} x + 13 \, a b\right )} x\right )} \]
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Timed out. \[ \int \frac {\left (a x+b x^2\right )^{5/2}}{x^3} \, dx=\int \frac {{\left (b\,x^2+a\,x\right )}^{5/2}}{x^3} \,d x \]
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