Integrand size = 16, antiderivative size = 29 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\frac {2 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{\sqrt {b}} \]
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Time = 0.01 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.188, Rules used = {65, 223, 209} \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\frac {2 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{\sqrt {b}} \]
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Rule 65
Rule 209
Rule 223
Rubi steps \begin{align*} \text {integral}& = 2 \text {Subst}\left (\int \frac {1}{\sqrt {a-b x^2}} \, dx,x,\sqrt {x}\right ) \\ & = 2 \text {Subst}\left (\int \frac {1}{1+b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {a-b x}}\right ) \\ & = \frac {2 \tan ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{\sqrt {b}} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 39, normalized size of antiderivative = 1.34 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\frac {4 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{-\sqrt {a}+\sqrt {a-b x}}\right )}{\sqrt {b}} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(50\) vs. \(2(21)=42\).
Time = 0.09 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.76
method | result | size |
default | \(\frac {\sqrt {x \left (-b x +a \right )}\, \arctan \left (\frac {\sqrt {b}\, \left (x -\frac {a}{2 b}\right )}{\sqrt {-b \,x^{2}+a x}}\right )}{\sqrt {x}\, \sqrt {-b x +a}\, \sqrt {b}}\) | \(51\) |
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none
Time = 0.23 (sec) , antiderivative size = 57, normalized size of antiderivative = 1.97 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\left [-\frac {\sqrt {-b} \log \left (-2 \, b x + 2 \, \sqrt {-b x + a} \sqrt {-b} \sqrt {x} + a\right )}{b}, -\frac {2 \, \arctan \left (\frac {\sqrt {-b x + a}}{\sqrt {b} \sqrt {x}}\right )}{\sqrt {b}}\right ] \]
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Result contains complex when optimal does not.
Time = 0.94 (sec) , antiderivative size = 54, normalized size of antiderivative = 1.86 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\begin {cases} - \frac {2 i \operatorname {acosh}{\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a}} \right )}}{\sqrt {b}} & \text {for}\: \left |{\frac {b x}{a}}\right | > 1 \\\frac {2 \operatorname {asin}{\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a}} \right )}}{\sqrt {b}} & \text {otherwise} \end {cases} \]
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none
Time = 0.29 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.72 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=-\frac {2 \, \arctan \left (\frac {\sqrt {-b x + a}}{\sqrt {b} \sqrt {x}}\right )}{\sqrt {b}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 45 vs. \(2 (21) = 42\).
Time = 77.18 (sec) , antiderivative size = 45, normalized size of antiderivative = 1.55 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=\frac {2 \, b \log \left ({\left | -\sqrt {-b x + a} \sqrt {-b} + \sqrt {{\left (b x - a\right )} b + a b} \right |}\right )}{\sqrt {-b} {\left | b \right |}} \]
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Time = 0.03 (sec) , antiderivative size = 27, normalized size of antiderivative = 0.93 \[ \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx=-\frac {4\,\mathrm {atan}\left (\frac {\sqrt {a-b\,x}-\sqrt {a}}{\sqrt {b}\,\sqrt {x}}\right )}{\sqrt {b}} \]
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