Integrand size = 16, antiderivative size = 75 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=\frac {1}{3 x^{3/2} (2-b x)^{3/2}}+\frac {1}{x^{3/2} \sqrt {2-b x}}-\frac {2 \sqrt {2-b x}}{3 x^{3/2}}-\frac {2 b \sqrt {2-b x}}{3 \sqrt {x}} \]
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Time = 0.01 (sec) , antiderivative size = 75, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {47, 37} \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=-\frac {2 \sqrt {2-b x}}{3 x^{3/2}}+\frac {1}{x^{3/2} \sqrt {2-b x}}+\frac {1}{3 x^{3/2} (2-b x)^{3/2}}-\frac {2 b \sqrt {2-b x}}{3 \sqrt {x}} \]
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Rule 37
Rule 47
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3 x^{3/2} (2-b x)^{3/2}}+\int \frac {1}{x^{5/2} (2-b x)^{3/2}} \, dx \\ & = \frac {1}{3 x^{3/2} (2-b x)^{3/2}}+\frac {1}{x^{3/2} \sqrt {2-b x}}+2 \int \frac {1}{x^{5/2} \sqrt {2-b x}} \, dx \\ & = \frac {1}{3 x^{3/2} (2-b x)^{3/2}}+\frac {1}{x^{3/2} \sqrt {2-b x}}-\frac {2 \sqrt {2-b x}}{3 x^{3/2}}+\frac {1}{3} (2 b) \int \frac {1}{x^{3/2} \sqrt {2-b x}} \, dx \\ & = \frac {1}{3 x^{3/2} (2-b x)^{3/2}}+\frac {1}{x^{3/2} \sqrt {2-b x}}-\frac {2 \sqrt {2-b x}}{3 x^{3/2}}-\frac {2 b \sqrt {2-b x}}{3 \sqrt {x}} \\ \end{align*}
Time = 0.15 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.55 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=-\frac {1+3 b x-6 b^2 x^2+2 b^3 x^3}{3 x^{3/2} (2-b x)^{3/2}} \]
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Time = 0.11 (sec) , antiderivative size = 36, normalized size of antiderivative = 0.48
method | result | size |
gosper | \(-\frac {2 b^{3} x^{3}-6 b^{2} x^{2}+3 b x +1}{3 x^{\frac {3}{2}} \left (-b x +2\right )^{\frac {3}{2}}}\) | \(36\) |
meijerg | \(-\frac {\sqrt {2}\, \left (2 b^{3} x^{3}-6 b^{2} x^{2}+3 b x +1\right )}{12 x^{\frac {3}{2}} \left (-\frac {b x}{2}+1\right )^{\frac {3}{2}}}\) | \(39\) |
default | \(-\frac {1}{3 x^{\frac {3}{2}} \left (-b x +2\right )^{\frac {3}{2}}}+b \left (-\frac {1}{\left (-b x +2\right )^{\frac {3}{2}} \sqrt {x}}+2 b \left (\frac {\sqrt {x}}{3 \left (-b x +2\right )^{\frac {3}{2}}}+\frac {\sqrt {x}}{3 \sqrt {-b x +2}}\right )\right )\) | \(61\) |
risch | \(\frac {\left (4 b^{2} x^{2}-7 b x -2\right ) \sqrt {\left (-b x +2\right ) x}}{12 x^{\frac {3}{2}} \sqrt {-x \left (b x -2\right )}\, \sqrt {-b x +2}}+\frac {b^{2} \left (4 b x -9\right ) \sqrt {x}\, \sqrt {\left (-b x +2\right ) x}}{12 \sqrt {-x \left (b x -2\right )}\, \left (b x -2\right ) \sqrt {-b x +2}}\) | \(98\) |
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Time = 0.23 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.75 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=-\frac {{\left (2 \, b^{3} x^{3} - 6 \, b^{2} x^{2} + 3 \, b x + 1\right )} \sqrt {-b x + 2} \sqrt {x}}{3 \, {\left (b^{2} x^{4} - 4 \, b x^{3} + 4 \, x^{2}\right )}} \]
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Result contains complex when optimal does not.
Time = 5.56 (sec) , antiderivative size = 530, normalized size of antiderivative = 7.07 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=\begin {cases} - \frac {2 b^{\frac {27}{2}} x^{4} \sqrt {-1 + \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {10 b^{\frac {25}{2}} x^{3} \sqrt {-1 + \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} - \frac {15 b^{\frac {23}{2}} x^{2} \sqrt {-1 + \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {5 b^{\frac {21}{2}} x \sqrt {-1 + \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {2 b^{\frac {19}{2}} \sqrt {-1 + \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} & \text {for}\: \frac {1}{\left |{b x}\right |} > \frac {1}{2} \\- \frac {2 i b^{\frac {27}{2}} x^{4} \sqrt {1 - \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {10 i b^{\frac {25}{2}} x^{3} \sqrt {1 - \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} - \frac {15 i b^{\frac {23}{2}} x^{2} \sqrt {1 - \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {5 i b^{\frac {21}{2}} x \sqrt {1 - \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} + \frac {2 i b^{\frac {19}{2}} \sqrt {1 - \frac {2}{b x}}}{3 b^{12} x^{4} - 18 b^{11} x^{3} + 36 b^{10} x^{2} - 24 b^{9} x} & \text {otherwise} \end {cases} \]
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Time = 0.22 (sec) , antiderivative size = 58, normalized size of antiderivative = 0.77 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=-\frac {3 \, \sqrt {-b x + 2} b}{8 \, \sqrt {x}} + \frac {{\left (b^{3} - \frac {9 \, {\left (b x - 2\right )} b^{2}}{x}\right )} x^{\frac {3}{2}}}{24 \, {\left (-b x + 2\right )}^{\frac {3}{2}}} - \frac {{\left (-b x + 2\right )}^{\frac {3}{2}}}{24 \, x^{\frac {3}{2}}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 183 vs. \(2 (53) = 106\).
Time = 0.45 (sec) , antiderivative size = 183, normalized size of antiderivative = 2.44 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=-\frac {{\left (4 \, {\left (b x - 2\right )} b^{2} {\left | b \right |} + 9 \, b^{2} {\left | b \right |}\right )} \sqrt {-b x + 2}}{12 \, {\left ({\left (b x - 2\right )} b + 2 \, b\right )}^{\frac {3}{2}}} - \frac {3 \, {\left (\sqrt {-b x + 2} \sqrt {-b} - \sqrt {{\left (b x - 2\right )} b + 2 \, b}\right )}^{4} \sqrt {-b} b^{3} - 18 \, {\left (\sqrt {-b x + 2} \sqrt {-b} - \sqrt {{\left (b x - 2\right )} b + 2 \, b}\right )}^{2} \sqrt {-b} b^{4} + 16 \, \sqrt {-b} b^{5}}{3 \, {\left ({\left (\sqrt {-b x + 2} \sqrt {-b} - \sqrt {{\left (b x - 2\right )} b + 2 \, b}\right )}^{2} - 2 \, b\right )}^{3} {\left | b \right |}} \]
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Time = 0.45 (sec) , antiderivative size = 73, normalized size of antiderivative = 0.97 \[ \int \frac {1}{x^{5/2} (2-b x)^{5/2}} \, dx=\frac {\sqrt {2-b\,x}+3\,b\,x\,\sqrt {2-b\,x}-6\,b^2\,x^2\,\sqrt {2-b\,x}+2\,b^3\,x^3\,\sqrt {2-b\,x}}{x^{3/2}\,\left (x\,\left (12\,b-3\,b^2\,x\right )-12\right )} \]
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