Integrand size = 16, antiderivative size = 34 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\frac {1}{\sqrt {x} \sqrt {2-b x}}-\frac {\sqrt {2-b x}}{\sqrt {x}} \]
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Time = 0.00 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {47, 37} \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\frac {1}{\sqrt {x} \sqrt {2-b x}}-\frac {\sqrt {2-b x}}{\sqrt {x}} \]
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Rule 37
Rule 47
Rubi steps \begin{align*} \text {integral}& = \frac {1}{\sqrt {x} \sqrt {2-b x}}+\int \frac {1}{x^{3/2} \sqrt {2-b x}} \, dx \\ & = \frac {1}{\sqrt {x} \sqrt {2-b x}}-\frac {\sqrt {2-b x}}{\sqrt {x}} \\ \end{align*}
Time = 0.09 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.62 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\frac {-1+b x}{\sqrt {x} \sqrt {2-b x}} \]
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Time = 0.10 (sec) , antiderivative size = 18, normalized size of antiderivative = 0.53
method | result | size |
gosper | \(\frac {b x -1}{\sqrt {x}\, \sqrt {-b x +2}}\) | \(18\) |
meijerg | \(-\frac {\sqrt {2}\, \left (-b x +1\right )}{2 \sqrt {x}\, \sqrt {-\frac {b x}{2}+1}}\) | \(23\) |
default | \(-\frac {1}{\sqrt {x}\, \sqrt {-b x +2}}+\frac {\sqrt {x}\, b}{\sqrt {-b x +2}}\) | \(28\) |
risch | \(\frac {\left (b x -2\right ) \sqrt {\left (-b x +2\right ) x}}{2 \sqrt {-x \left (b x -2\right )}\, \sqrt {x}\, \sqrt {-b x +2}}+\frac {b \sqrt {x}\, \sqrt {\left (-b x +2\right ) x}}{2 \sqrt {-x \left (b x -2\right )}\, \sqrt {-b x +2}}\) | \(74\) |
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none
Time = 0.23 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.85 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=-\frac {{\left (b x - 1\right )} \sqrt {-b x + 2} \sqrt {x}}{b x^{2} - 2 \, x} \]
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Result contains complex when optimal does not.
Time = 1.60 (sec) , antiderivative size = 90, normalized size of antiderivative = 2.65 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\begin {cases} - \frac {b^{\frac {5}{2}} x \sqrt {-1 + \frac {2}{b x}}}{b^{2} x - 2 b} + \frac {b^{\frac {3}{2}} \sqrt {-1 + \frac {2}{b x}}}{b^{2} x - 2 b} & \text {for}\: \frac {1}{\left |{b x}\right |} > \frac {1}{2} \\- \frac {i \sqrt {b}}{\sqrt {1 - \frac {2}{b x}}} + \frac {i}{\sqrt {b} x \sqrt {1 - \frac {2}{b x}}} & \text {otherwise} \end {cases} \]
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Time = 0.20 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.82 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\frac {b \sqrt {x}}{2 \, \sqrt {-b x + 2}} - \frac {\sqrt {-b x + 2}}{2 \, \sqrt {x}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 83 vs. \(2 (26) = 52\).
Time = 0.28 (sec) , antiderivative size = 83, normalized size of antiderivative = 2.44 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=-\frac {\sqrt {-b x + 2} b^{2}}{2 \, \sqrt {{\left (b x - 2\right )} b + 2 \, b} {\left | b \right |}} - \frac {2 \, \sqrt {-b} b^{2}}{{\left ({\left (\sqrt {-b x + 2} \sqrt {-b} - \sqrt {{\left (b x - 2\right )} b + 2 \, b}\right )}^{2} - 2 \, b\right )} {\left | b \right |}} \]
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Time = 0.34 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.79 \[ \int \frac {1}{x^{3/2} (2-b x)^{3/2}} \, dx=\frac {b\,\sqrt {x}}{\sqrt {2-b\,x}}-\frac {1}{\sqrt {x}\,\sqrt {2-b\,x}} \]
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