Integrand size = 20, antiderivative size = 11 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\frac {\arcsin (3+2 b x)}{b} \]
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Time = 0.01 (sec) , antiderivative size = 11, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.150, Rules used = {55, 633, 222} \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\frac {\arcsin (2 b x+3)}{b} \]
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Rule 55
Rule 222
Rule 633
Rubi steps \begin{align*} \text {integral}& = \int \frac {1}{\sqrt {-2-3 b x-b^2 x^2}} \, dx \\ & = -\frac {\text {Subst}\left (\int \frac {1}{\sqrt {1-\frac {x^2}{b^2}}} \, dx,x,-3 b-2 b^2 x\right )}{b^2} \\ & = \frac {\sin ^{-1}(3+2 b x)}{b} \\ \end{align*}
Leaf count is larger than twice the leaf count of optimal. \(59\) vs. \(2(11)=22\).
Time = 0.01 (sec) , antiderivative size = 59, normalized size of antiderivative = 5.36 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\frac {2 \sqrt {1+b x} \sqrt {2+b x} \text {arctanh}\left (\frac {\sqrt {2+b x}}{\sqrt {1+b x}}\right )}{b \sqrt {-((1+b x) (2+b x))}} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(65\) vs. \(2(11)=22\).
Time = 0.54 (sec) , antiderivative size = 66, normalized size of antiderivative = 6.00
method | result | size |
default | \(\frac {\sqrt {\left (-b x -1\right ) \left (b x +2\right )}\, \arctan \left (\frac {\sqrt {b^{2}}\, \left (x +\frac {3}{2 b}\right )}{\sqrt {-b^{2} x^{2}-3 b x -2}}\right )}{\sqrt {-b x -1}\, \sqrt {b x +2}\, \sqrt {b^{2}}}\) | \(66\) |
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Leaf count of result is larger than twice the leaf count of optimal. 44 vs. \(2 (11) = 22\).
Time = 0.23 (sec) , antiderivative size = 44, normalized size of antiderivative = 4.00 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=-\frac {\arctan \left (\frac {{\left (2 \, b x + 3\right )} \sqrt {b x + 2} \sqrt {-b x - 1}}{2 \, {\left (b^{2} x^{2} + 3 \, b x + 2\right )}}\right )}{b} \]
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\[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\int \frac {1}{\sqrt {- b x - 1} \sqrt {b x + 2}}\, dx \]
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none
Time = 0.28 (sec) , antiderivative size = 21, normalized size of antiderivative = 1.91 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=-\frac {\arcsin \left (-\frac {2 \, b^{2} x + 3 \, b}{b}\right )}{b} \]
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none
Time = 0.31 (sec) , antiderivative size = 13, normalized size of antiderivative = 1.18 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\frac {2 \, \arcsin \left (\sqrt {b x + 2}\right )}{b} \]
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Time = 0.31 (sec) , antiderivative size = 41, normalized size of antiderivative = 3.73 \[ \int \frac {1}{\sqrt {-1-b x} \sqrt {2+b x}} \, dx=\frac {4\,\mathrm {atan}\left (\frac {b\,\left (\sqrt {-b\,x-1}-\mathrm {i}\right )}{\left (\sqrt {2}-\sqrt {b\,x+2}\right )\,\sqrt {b^2}}\right )}{\sqrt {b^2}} \]
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