Integrand size = 16, antiderivative size = 84 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=5 b^2 \sqrt {x} \sqrt {2-b x}+\frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+10 b^{3/2} \arcsin \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right ) \]
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Time = 0.01 (sec) , antiderivative size = 84, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {49, 52, 56, 222} \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=10 b^{3/2} \arcsin \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )+5 b^2 \sqrt {x} \sqrt {2-b x}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+\frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}} \]
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Rule 49
Rule 52
Rule 56
Rule 222
Rubi steps \begin{align*} \text {integral}& = -\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}-\frac {1}{3} (5 b) \int \frac {(2-b x)^{3/2}}{x^{3/2}} \, dx \\ & = \frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+\left (5 b^2\right ) \int \frac {\sqrt {2-b x}}{\sqrt {x}} \, dx \\ & = 5 b^2 \sqrt {x} \sqrt {2-b x}+\frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+\left (5 b^2\right ) \int \frac {1}{\sqrt {x} \sqrt {2-b x}} \, dx \\ & = 5 b^2 \sqrt {x} \sqrt {2-b x}+\frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+\left (10 b^2\right ) \text {Subst}\left (\int \frac {1}{\sqrt {2-b x^2}} \, dx,x,\sqrt {x}\right ) \\ & = 5 b^2 \sqrt {x} \sqrt {2-b x}+\frac {10 b (2-b x)^{3/2}}{3 \sqrt {x}}-\frac {2 (2-b x)^{5/2}}{3 x^{3/2}}+10 b^{3/2} \sin ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right ) \\ \end{align*}
Time = 0.15 (sec) , antiderivative size = 73, normalized size of antiderivative = 0.87 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=\frac {\sqrt {2-b x} \left (-8+28 b x+3 b^2 x^2\right )}{3 x^{3/2}}-20 b^{3/2} \arctan \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}-\sqrt {2-b x}}\right ) \]
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Time = 0.11 (sec) , antiderivative size = 78, normalized size of antiderivative = 0.93
method | result | size |
meijerg | \(\frac {15 \left (-b \right )^{\frac {5}{2}} \left (\frac {32 \sqrt {\pi }\, \sqrt {2}\, \left (-\frac {3}{8} b^{2} x^{2}-\frac {7}{2} b x +1\right ) \sqrt {-\frac {b x}{2}+1}}{45 x^{\frac {3}{2}} \left (-b \right )^{\frac {3}{2}}}-\frac {8 \sqrt {\pi }\, b^{\frac {3}{2}} \arcsin \left (\frac {\sqrt {b}\, \sqrt {x}\, \sqrt {2}}{2}\right )}{3 \left (-b \right )^{\frac {3}{2}}}\right )}{4 \sqrt {\pi }\, b}\) | \(78\) |
risch | \(-\frac {\left (3 b^{3} x^{3}+22 b^{2} x^{2}-64 b x +16\right ) \sqrt {\left (-b x +2\right ) x}}{3 x^{\frac {3}{2}} \sqrt {-x \left (b x -2\right )}\, \sqrt {-b x +2}}+\frac {5 b^{\frac {3}{2}} \arctan \left (\frac {\sqrt {b}\, \left (x -\frac {1}{b}\right )}{\sqrt {-b \,x^{2}+2 x}}\right ) \sqrt {\left (-b x +2\right ) x}}{\sqrt {x}\, \sqrt {-b x +2}}\) | \(107\) |
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Time = 0.24 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.50 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=\left [\frac {15 \, \sqrt {-b} b x^{2} \log \left (-b x - \sqrt {-b x + 2} \sqrt {-b} \sqrt {x} + 1\right ) + {\left (3 \, b^{2} x^{2} + 28 \, b x - 8\right )} \sqrt {-b x + 2} \sqrt {x}}{3 \, x^{2}}, -\frac {30 \, b^{\frac {3}{2}} x^{2} \arctan \left (\frac {\sqrt {-b x + 2}}{\sqrt {b} \sqrt {x}}\right ) - {\left (3 \, b^{2} x^{2} + 28 \, b x - 8\right )} \sqrt {-b x + 2} \sqrt {x}}{3 \, x^{2}}\right ] \]
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Result contains complex when optimal does not.
Time = 4.50 (sec) , antiderivative size = 223, normalized size of antiderivative = 2.65 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=\begin {cases} b^{\frac {5}{2}} x \sqrt {-1 + \frac {2}{b x}} + \frac {28 b^{\frac {3}{2}} \sqrt {-1 + \frac {2}{b x}}}{3} + 5 i b^{\frac {3}{2}} \log {\left (\frac {1}{b x} \right )} - 10 i b^{\frac {3}{2}} \log {\left (\frac {1}{\sqrt {b} \sqrt {x}} \right )} + 10 b^{\frac {3}{2}} \operatorname {asin}{\left (\frac {\sqrt {2} \sqrt {b} \sqrt {x}}{2} \right )} - \frac {8 \sqrt {b} \sqrt {-1 + \frac {2}{b x}}}{3 x} & \text {for}\: \frac {1}{\left |{b x}\right |} > \frac {1}{2} \\i b^{\frac {5}{2}} x \sqrt {1 - \frac {2}{b x}} + \frac {28 i b^{\frac {3}{2}} \sqrt {1 - \frac {2}{b x}}}{3} + 5 i b^{\frac {3}{2}} \log {\left (\frac {1}{b x} \right )} - 10 i b^{\frac {3}{2}} \log {\left (\sqrt {1 - \frac {2}{b x}} + 1 \right )} - \frac {8 i \sqrt {b} \sqrt {1 - \frac {2}{b x}}}{3 x} & \text {otherwise} \end {cases} \]
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Time = 0.30 (sec) , antiderivative size = 79, normalized size of antiderivative = 0.94 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=-10 \, b^{\frac {3}{2}} \arctan \left (\frac {\sqrt {-b x + 2}}{\sqrt {b} \sqrt {x}}\right ) + \frac {8 \, \sqrt {-b x + 2} b}{\sqrt {x}} + \frac {2 \, \sqrt {-b x + 2} b^{2}}{{\left (b - \frac {b x - 2}{x}\right )} \sqrt {x}} - \frac {4 \, {\left (-b x + 2\right )}^{\frac {3}{2}}}{3 \, x^{\frac {3}{2}}} \]
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Time = 5.85 (sec) , antiderivative size = 99, normalized size of antiderivative = 1.18 \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=\frac {{\left (\frac {30 \, b^{2} \log \left ({\left | -\sqrt {-b x + 2} \sqrt {-b} + \sqrt {{\left (b x - 2\right )} b + 2 \, b} \right |}\right )}{\sqrt {-b}} + \frac {{\left (60 \, b^{3} + {\left (3 \, {\left (b x - 2\right )} b^{3} + 40 \, b^{3}\right )} {\left (b x - 2\right )}\right )} \sqrt {-b x + 2}}{{\left ({\left (b x - 2\right )} b + 2 \, b\right )}^{\frac {3}{2}}}\right )} b}{3 \, {\left | b \right |}} \]
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Timed out. \[ \int \frac {(2-b x)^{5/2}}{x^{5/2}} \, dx=\int \frac {{\left (2-b\,x\right )}^{5/2}}{x^{5/2}} \,d x \]
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