Integrand size = 25, antiderivative size = 116 \[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\frac {\arctan \left (\frac {\sqrt [4]{b} x \left (\sqrt {a}+\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c}+\frac {\text {arctanh}\left (\frac {\sqrt [4]{b} x \left (\sqrt {a}-\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c} \]
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Time = 0.02 (sec) , antiderivative size = 116, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.040, Rules used = {414} \[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\frac {\arctan \left (\frac {\sqrt [4]{b} x \left (\sqrt {a}+\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c}+\frac {\text {arctanh}\left (\frac {\sqrt [4]{b} x \left (\sqrt {a}-\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c} \]
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Rule 414
Rubi steps \begin{align*} \text {integral}& = \frac {\tan ^{-1}\left (\frac {\sqrt [4]{b} x \left (\sqrt {a}+\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c}+\frac {\tanh ^{-1}\left (\frac {\sqrt [4]{b} x \left (\sqrt {a}-\sqrt {b} x^2\right )}{\sqrt [4]{a} \sqrt {a-b x^4}}\right )}{2 \sqrt [4]{a} \sqrt [4]{b} c} \\ \end{align*}
Result contains complex when optimal does not.
Time = 0.52 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.76 \[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\frac {\left (\frac {1}{4}-\frac {i}{4}\right ) \left (\arctan \left (\frac {(1+i) \sqrt [4]{a} \sqrt [4]{b} x}{\sqrt {a-b x^4}}\right )-i \arctan \left (\frac {\left (\frac {1}{2}+\frac {i}{2}\right ) \sqrt {a-b x^4}}{\sqrt [4]{a} \sqrt [4]{b} x}\right )\right )}{\sqrt [4]{a} \sqrt [4]{b} c} \]
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Time = 6.37 (sec) , antiderivative size = 141, normalized size of antiderivative = 1.22
method | result | size |
default | \(-\frac {\ln \left (\frac {\frac {-b \,x^{4}+a}{2 x^{2}}-\frac {\left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}}{x}+\sqrt {a b}}{\frac {-b \,x^{4}+a}{2 x^{2}}+\frac {\left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}}{x}+\sqrt {a b}}\right )+2 \arctan \left (\frac {\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}+1\right )+2 \arctan \left (\frac {\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}-1\right )}{8 c \left (a b \right )^{\frac {1}{4}}}\) | \(141\) |
elliptic | \(-\frac {\ln \left (\frac {\frac {-b \,x^{4}+a}{2 x^{2}}-\frac {\left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}}{x}+\sqrt {a b}}{\frac {-b \,x^{4}+a}{2 x^{2}}+\frac {\left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}}{x}+\sqrt {a b}}\right )+2 \arctan \left (\frac {\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}+1\right )+2 \arctan \left (\frac {\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}-1\right )}{8 c \left (a b \right )^{\frac {1}{4}}}\) | \(141\) |
pseudoelliptic | \(-\frac {\ln \left (\frac {-b \,x^{4}+2 x^{2} \sqrt {a b}-2 \left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}\, x +a}{-b \,x^{4}+2 \left (a b \right )^{\frac {1}{4}} \sqrt {-b \,x^{4}+a}\, x +2 x^{2} \sqrt {a b}+a}\right )+2 \arctan \left (\frac {x \left (a b \right )^{\frac {1}{4}}+\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}\right )+2 \arctan \left (\frac {-x \left (a b \right )^{\frac {1}{4}}+\sqrt {-b \,x^{4}+a}}{x \left (a b \right )^{\frac {1}{4}}}\right )}{8 \left (a b \right )^{\frac {1}{4}} c}\) | \(149\) |
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Result contains complex when optimal does not.
Time = 0.58 (sec) , antiderivative size = 482, normalized size of antiderivative = 4.16 \[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=-\frac {1}{4} \, \left (\frac {1}{4}\right )^{\frac {1}{4}} \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} \log \left (-\frac {4 \, \left (\frac {1}{4}\right )^{\frac {3}{4}} a b c^{3} x^{3} \left (-\frac {1}{a b c^{4}}\right )^{\frac {3}{4}} + \sqrt {-b x^{4} + a} a c^{2} \sqrt {-\frac {1}{a b c^{4}}} - 2 \, \left (\frac {1}{4}\right )^{\frac {1}{4}} a c x \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} + \sqrt {-b x^{4} + a} x^{2}}{b x^{4} + a}\right ) + \frac {1}{4} \, \left (\frac {1}{4}\right )^{\frac {1}{4}} \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} \log \left (\frac {4 \, \left (\frac {1}{4}\right )^{\frac {3}{4}} a b c^{3} x^{3} \left (-\frac {1}{a b c^{4}}\right )^{\frac {3}{4}} - \sqrt {-b x^{4} + a} a c^{2} \sqrt {-\frac {1}{a b c^{4}}} - 2 \, \left (\frac {1}{4}\right )^{\frac {1}{4}} a c x \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} - \sqrt {-b x^{4} + a} x^{2}}{b x^{4} + a}\right ) - \frac {1}{4} i \, \left (\frac {1}{4}\right )^{\frac {1}{4}} \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} \log \left (\frac {4 i \, \left (\frac {1}{4}\right )^{\frac {3}{4}} a b c^{3} x^{3} \left (-\frac {1}{a b c^{4}}\right )^{\frac {3}{4}} + \sqrt {-b x^{4} + a} a c^{2} \sqrt {-\frac {1}{a b c^{4}}} + 2 i \, \left (\frac {1}{4}\right )^{\frac {1}{4}} a c x \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} - \sqrt {-b x^{4} + a} x^{2}}{b x^{4} + a}\right ) + \frac {1}{4} i \, \left (\frac {1}{4}\right )^{\frac {1}{4}} \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} \log \left (\frac {-4 i \, \left (\frac {1}{4}\right )^{\frac {3}{4}} a b c^{3} x^{3} \left (-\frac {1}{a b c^{4}}\right )^{\frac {3}{4}} + \sqrt {-b x^{4} + a} a c^{2} \sqrt {-\frac {1}{a b c^{4}}} - 2 i \, \left (\frac {1}{4}\right )^{\frac {1}{4}} a c x \left (-\frac {1}{a b c^{4}}\right )^{\frac {1}{4}} - \sqrt {-b x^{4} + a} x^{2}}{b x^{4} + a}\right ) \]
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\[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\frac {\int \frac {\sqrt {a - b x^{4}}}{a + b x^{4}}\, dx}{c} \]
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\[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\int { \frac {\sqrt {-b x^{4} + a}}{b c x^{4} + a c} \,d x } \]
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\[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\int { \frac {\sqrt {-b x^{4} + a}}{b c x^{4} + a c} \,d x } \]
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Timed out. \[ \int \frac {\sqrt {a-b x^4}}{a c+b c x^4} \, dx=\int \frac {\sqrt {a-b\,x^4}}{b\,c\,x^4+a\,c} \,d x \]
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