Integrand size = 16, antiderivative size = 41 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=\frac {2}{a \sqrt {x} \sqrt {a-b x}}-\frac {4 \sqrt {a-b x}}{a^2 \sqrt {x}} \]
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Time = 0.00 (sec) , antiderivative size = 41, 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} \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=\frac {2}{a \sqrt {x} \sqrt {a-b x}}-\frac {4 \sqrt {a-b x}}{a^2 \sqrt {x}} \]
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Rule 37
Rule 47
Rubi steps \begin{align*} \text {integral}& = \frac {2}{a \sqrt {x} \sqrt {a-b x}}+\frac {2 \int \frac {1}{x^{3/2} \sqrt {a-b x}} \, dx}{a} \\ & = \frac {2}{a \sqrt {x} \sqrt {a-b x}}-\frac {4 \sqrt {a-b x}}{a^2 \sqrt {x}} \\ \end{align*}
Time = 0.09 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.63 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=-\frac {2 (a-2 b x)}{a^2 \sqrt {x} \sqrt {a-b x}} \]
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Time = 0.10 (sec) , antiderivative size = 23, normalized size of antiderivative = 0.56
method | result | size |
gosper | \(-\frac {2 \left (-2 b x +a \right )}{\sqrt {x}\, \sqrt {-b x +a}\, a^{2}}\) | \(23\) |
default | \(-\frac {2}{a \sqrt {x}\, \sqrt {-b x +a}}+\frac {4 b \sqrt {x}}{a^{2} \sqrt {-b x +a}}\) | \(35\) |
risch | \(-\frac {2 \sqrt {-b x +a}}{a^{2} \sqrt {x}}+\frac {2 b \sqrt {x}}{a^{2} \sqrt {-b x +a}}\) | \(35\) |
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none
Time = 0.23 (sec) , antiderivative size = 38, normalized size of antiderivative = 0.93 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=-\frac {2 \, {\left (2 \, b x - a\right )} \sqrt {-b x + a} \sqrt {x}}{a^{2} b x^{2} - a^{3} x} \]
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Result contains complex when optimal does not.
Time = 0.86 (sec) , antiderivative size = 112, normalized size of antiderivative = 2.73 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=\begin {cases} - \frac {2}{a \sqrt {b} x \sqrt {\frac {a}{b x} - 1}} + \frac {4 \sqrt {b}}{a^{2} \sqrt {\frac {a}{b x} - 1}} & \text {for}\: \left |{\frac {a}{b x}}\right | > 1 \\\frac {2 i a b^{\frac {3}{2}} \sqrt {- \frac {a}{b x} + 1}}{- a^{3} b + a^{2} b^{2} x} - \frac {4 i b^{\frac {5}{2}} x \sqrt {- \frac {a}{b x} + 1}}{- a^{3} b + a^{2} b^{2} x} & \text {otherwise} \end {cases} \]
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Time = 0.21 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.83 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=\frac {2 \, b \sqrt {x}}{\sqrt {-b x + a} a^{2}} - \frac {2 \, \sqrt {-b x + a}}{a^{2} \sqrt {x}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 94 vs. \(2 (33) = 66\).
Time = 0.31 (sec) , antiderivative size = 94, normalized size of antiderivative = 2.29 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=-\frac {4 \, \sqrt {-b} b^{2}}{{\left ({\left (\sqrt {-b x + a} \sqrt {-b} - \sqrt {{\left (b x - a\right )} b + a b}\right )}^{2} - a b\right )} a {\left | b \right |}} - \frac {2 \, \sqrt {-b x + a} b^{2}}{\sqrt {{\left (b x - a\right )} b + a b} a^{2} {\left | b \right |}} \]
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Time = 0.41 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.02 \[ \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx=-\frac {2\,a\,\sqrt {a-b\,x}-4\,b\,x\,\sqrt {a-b\,x}}{\sqrt {x}\,\left (a^3-a^2\,b\,x\right )} \]
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