Integrand size = 31, antiderivative size = 60 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\frac {\text {arctanh}\left (\frac {1-2 b x}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}}-\frac {\text {arctanh}\left (\frac {1+2 b x}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}} \]
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Time = 0.05 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.097, Rules used = {1175, 632, 212} \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\frac {\text {arctanh}\left (\frac {1-2 b x}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}}-\frac {\text {arctanh}\left (\frac {2 b x+1}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}} \]
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Rule 212
Rule 632
Rule 1175
Rubi steps \begin{align*} \text {integral}& = \frac {\int \frac {1}{\frac {a}{b}-\frac {x}{b}+x^2} \, dx}{2 b}+\frac {\int \frac {1}{\frac {a}{b}+\frac {x}{b}+x^2} \, dx}{2 b} \\ & = -\frac {\text {Subst}\left (\int \frac {1}{\frac {1-4 a b}{b^2}-x^2} \, dx,x,-\frac {1}{b}+2 x\right )}{b}-\frac {\text {Subst}\left (\int \frac {1}{\frac {1-4 a b}{b^2}-x^2} \, dx,x,\frac {1}{b}+2 x\right )}{b} \\ & = \frac {\tanh ^{-1}\left (\frac {1-2 b x}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}}-\frac {\tanh ^{-1}\left (\frac {1+2 b x}{\sqrt {1-4 a b}}\right )}{\sqrt {1-4 a b}} \\ \end{align*}
Leaf count is larger than twice the leaf count of optimal. \(138\) vs. \(2(60)=120\).
Time = 0.13 (sec) , antiderivative size = 138, normalized size of antiderivative = 2.30 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\frac {\frac {\left (1+\sqrt {1-4 a b}\right ) \arctan \left (\frac {b x}{\sqrt {-\frac {1}{2}+a b-\frac {1}{2} \sqrt {1-4 a b}}}\right )}{\sqrt {-1+2 a b-\sqrt {1-4 a b}}}+\frac {\left (-1+\sqrt {1-4 a b}\right ) \arctan \left (\frac {\sqrt {2} b x}{\sqrt {-1+2 a b+\sqrt {1-4 a b}}}\right )}{\sqrt {-1+2 a b+\sqrt {1-4 a b}}}}{\sqrt {2-8 a b}} \]
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Time = 0.07 (sec) , antiderivative size = 52, normalized size of antiderivative = 0.87
method | result | size |
default | \(\frac {\arctan \left (\frac {2 b x +1}{\sqrt {4 a b -1}}\right )}{\sqrt {4 a b -1}}+\frac {\arctan \left (\frac {2 b x -1}{\sqrt {4 a b -1}}\right )}{\sqrt {4 a b -1}}\) | \(52\) |
risch | \(-\frac {\ln \left (b \,x^{2} \sqrt {-4 a b +1}+\left (-4 a b +1\right ) x -a \sqrt {-4 a b +1}\right )}{2 \sqrt {-4 a b +1}}+\frac {\ln \left (b \,x^{2} \sqrt {-4 a b +1}+x \left (4 a b -1\right )-a \sqrt {-4 a b +1}\right )}{2 \sqrt {-4 a b +1}}\) | \(90\) |
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Time = 0.26 (sec) , antiderivative size = 164, normalized size of antiderivative = 2.73 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\left [-\frac {\sqrt {-4 \, a b + 1} \log \left (\frac {b^{2} x^{4} - {\left (6 \, a b - 1\right )} x^{2} + a^{2} - 2 \, {\left (b x^{3} - a x\right )} \sqrt {-4 \, a b + 1}}{b^{2} x^{4} + {\left (2 \, a b - 1\right )} x^{2} + a^{2}}\right )}{2 \, {\left (4 \, a b - 1\right )}}, \frac {\sqrt {4 \, a b - 1} \arctan \left (\frac {b x}{\sqrt {4 \, a b - 1}}\right ) + \sqrt {4 \, a b - 1} \arctan \left (\frac {{\left (b^{2} x^{3} + {\left (3 \, a b - 1\right )} x\right )} \sqrt {4 \, a b - 1}}{4 \, a^{2} b - a}\right )}{4 \, a b - 1}\right ] \]
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Leaf count of result is larger than twice the leaf count of optimal. 117 vs. \(2 (56) = 112\).
Time = 0.25 (sec) , antiderivative size = 117, normalized size of antiderivative = 1.95 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=- \frac {\sqrt {- \frac {1}{4 a b - 1}} \log {\left (- \frac {a}{b} + x^{2} + \frac {x \left (- 4 a b \sqrt {- \frac {1}{4 a b - 1}} + \sqrt {- \frac {1}{4 a b - 1}}\right )}{b} \right )}}{2} + \frac {\sqrt {- \frac {1}{4 a b - 1}} \log {\left (- \frac {a}{b} + x^{2} + \frac {x \left (4 a b \sqrt {- \frac {1}{4 a b - 1}} - \sqrt {- \frac {1}{4 a b - 1}}\right )}{b} \right )}}{2} \]
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Exception generated. \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\text {Exception raised: ValueError} \]
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Time = 0.27 (sec) , antiderivative size = 51, normalized size of antiderivative = 0.85 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\frac {\arctan \left (\frac {2 \, b x + 1}{\sqrt {4 \, a b - 1}}\right )}{\sqrt {4 \, a b - 1}} + \frac {\arctan \left (\frac {2 \, b x - 1}{\sqrt {4 \, a b - 1}}\right )}{\sqrt {4 \, a b - 1}} \]
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Time = 13.77 (sec) , antiderivative size = 55, normalized size of antiderivative = 0.92 \[ \int \frac {a+b x^2}{a^2+(-1+2 a b) x^2+b^2 x^4} \, dx=\frac {\mathrm {atan}\left (\frac {b\,x}{\sqrt {4\,a\,b-1}}\right )+\mathrm {atan}\left (\frac {\frac {3\,x\,\left (4\,a\,b-1\right )}{4}-\frac {x}{4}+b^2\,x^3}{a\,\sqrt {4\,a\,b-1}}\right )}{\sqrt {4\,a\,b-1}} \]
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