Integrand size = 16, antiderivative size = 87 \[ \int \frac {c+d x}{a-b x^4} \, dx=\frac {c \arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {c \text {arctanh}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {d \text {arctanh}\left (\frac {\sqrt {b} x^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b}} \]
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Time = 0.05 (sec) , antiderivative size = 87, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.312, Rules used = {1890, 218, 214, 211, 281} \[ \int \frac {c+d x}{a-b x^4} \, dx=\frac {c \arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {c \text {arctanh}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {d \text {arctanh}\left (\frac {\sqrt {b} x^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b}} \]
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Rule 211
Rule 214
Rule 218
Rule 281
Rule 1890
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {c}{a-b x^4}+\frac {d x}{a-b x^4}\right ) \, dx \\ & = c \int \frac {1}{a-b x^4} \, dx+d \int \frac {x}{a-b x^4} \, dx \\ & = \frac {c \int \frac {1}{\sqrt {a}-\sqrt {b} x^2} \, dx}{2 \sqrt {a}}+\frac {c \int \frac {1}{\sqrt {a}+\sqrt {b} x^2} \, dx}{2 \sqrt {a}}+\frac {1}{2} d \text {Subst}\left (\int \frac {1}{a-b x^2} \, dx,x,x^2\right ) \\ & = \frac {c \tan ^{-1}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {c \tanh ^{-1}\left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )}{2 a^{3/4} \sqrt [4]{b}}+\frac {d \tanh ^{-1}\left (\frac {\sqrt {b} x^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b}} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 134, normalized size of antiderivative = 1.54 \[ \int \frac {c+d x}{a-b x^4} \, dx=\frac {2 \sqrt [4]{b} c \arctan \left (\frac {\sqrt [4]{b} x}{\sqrt [4]{a}}\right )-\left (\sqrt [4]{b} c+\sqrt [4]{a} d\right ) \log \left (\sqrt [4]{a}-\sqrt [4]{b} x\right )+\sqrt [4]{b} c \log \left (\sqrt [4]{a}+\sqrt [4]{b} x\right )-\sqrt [4]{a} d \log \left (\sqrt [4]{a}+\sqrt [4]{b} x\right )+\sqrt [4]{a} d \log \left (\sqrt {a}+\sqrt {b} x^2\right )}{4 a^{3/4} \sqrt {b}} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 1.47 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.39
method | result | size |
risch | \(-\frac {\munderset {\textit {\_R} =\operatorname {RootOf}\left (\textit {\_Z}^{4} b -a \right )}{\sum }\frac {\left (\textit {\_R} d +c \right ) \ln \left (x -\textit {\_R} \right )}{\textit {\_R}^{3}}}{4 b}\) | \(34\) |
default | \(\frac {c \left (\frac {a}{b}\right )^{\frac {1}{4}} \left (\ln \left (\frac {x +\left (\frac {a}{b}\right )^{\frac {1}{4}}}{x -\left (\frac {a}{b}\right )^{\frac {1}{4}}}\right )+2 \arctan \left (\frac {x}{\left (\frac {a}{b}\right )^{\frac {1}{4}}}\right )\right )}{4 a}+\frac {d \ln \left (\frac {a +x^{2} \sqrt {a b}}{a -x^{2} \sqrt {a b}}\right )}{4 \sqrt {a b}}\) | \(87\) |
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Result contains complex when optimal does not.
Time = 1.80 (sec) , antiderivative size = 39057, normalized size of antiderivative = 448.93 \[ \int \frac {c+d x}{a-b x^4} \, dx=\text {Too large to display} \]
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Time = 0.45 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.45 \[ \int \frac {c+d x}{a-b x^4} \, dx=- \operatorname {RootSum} {\left (256 t^{4} a^{3} b^{2} - 32 t^{2} a^{2} b d^{2} - 16 t a b c^{2} d + a d^{4} - b c^{4}, \left ( t \mapsto t \log {\left (x + \frac {- 128 t^{3} a^{3} b d^{2} + 16 t^{2} a^{2} b c^{2} d + 8 t a^{2} d^{4} - 4 t a b c^{4} + 5 a c^{2} d^{3}}{4 a c d^{4} + b c^{5}} \right )} \right )\right )} \]
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Leaf count of result is larger than twice the leaf count of optimal. 126 vs. \(2 (57) = 114\).
Time = 0.29 (sec) , antiderivative size = 126, normalized size of antiderivative = 1.45 \[ \int \frac {c+d x}{a-b x^4} \, dx=\frac {c \arctan \left (\frac {\sqrt {b} x}{\sqrt {\sqrt {a} \sqrt {b}}}\right )}{2 \, \sqrt {a} \sqrt {\sqrt {a} \sqrt {b}}} + \frac {d \log \left (\sqrt {b} x^{2} + \sqrt {a}\right )}{4 \, \sqrt {a} \sqrt {b}} - \frac {d \log \left (\sqrt {b} x^{2} - \sqrt {a}\right )}{4 \, \sqrt {a} \sqrt {b}} - \frac {c \log \left (\frac {\sqrt {b} x - \sqrt {\sqrt {a} \sqrt {b}}}{\sqrt {b} x + \sqrt {\sqrt {a} \sqrt {b}}}\right )}{4 \, \sqrt {a} \sqrt {\sqrt {a} \sqrt {b}}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 227 vs. \(2 (57) = 114\).
Time = 0.28 (sec) , antiderivative size = 227, normalized size of antiderivative = 2.61 \[ \int \frac {c+d x}{a-b x^4} \, dx=\frac {\sqrt {2} \left (-a b^{3}\right )^{\frac {1}{4}} c \log \left (x^{2} + \sqrt {2} x \left (-\frac {a}{b}\right )^{\frac {1}{4}} + \sqrt {-\frac {a}{b}}\right )}{8 \, a b} - \frac {\sqrt {2} \left (-a b^{3}\right )^{\frac {1}{4}} c \log \left (x^{2} - \sqrt {2} x \left (-\frac {a}{b}\right )^{\frac {1}{4}} + \sqrt {-\frac {a}{b}}\right )}{8 \, a b} - \frac {\sqrt {2} {\left (\sqrt {2} \sqrt {-a b} b d - \left (-a b^{3}\right )^{\frac {1}{4}} b c\right )} \arctan \left (\frac {\sqrt {2} {\left (2 \, x + \sqrt {2} \left (-\frac {a}{b}\right )^{\frac {1}{4}}\right )}}{2 \, \left (-\frac {a}{b}\right )^{\frac {1}{4}}}\right )}{4 \, a b^{2}} - \frac {\sqrt {2} {\left (\sqrt {2} \sqrt {-a b} b d - \left (-a b^{3}\right )^{\frac {1}{4}} b c\right )} \arctan \left (\frac {\sqrt {2} {\left (2 \, x - \sqrt {2} \left (-\frac {a}{b}\right )^{\frac {1}{4}}\right )}}{2 \, \left (-\frac {a}{b}\right )^{\frac {1}{4}}}\right )}{4 \, a b^{2}} \]
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Time = 9.25 (sec) , antiderivative size = 182, normalized size of antiderivative = 2.09 \[ \int \frac {c+d x}{a-b x^4} \, dx=\left \{\begin {array}{cl} \frac {2\,c+3\,d\,x}{6\,b\,x^3} & \text {\ if\ \ }a=0\\ \frac {\mathrm {atan}\left (\frac {\sqrt {2}\,{\left (-b\right )}^{1/4}\,x}{a^{1/4}}-1\right )\,\left (2\,a^{1/4}\,d+\sqrt {2}\,{\left (-b\right )}^{1/4}\,c\right )}{4\,a^{3/4}\,\sqrt {-b}}-\frac {\mathrm {atan}\left (\frac {\sqrt {2}\,{\left (-b\right )}^{1/4}\,x}{a^{1/4}}+1\right )\,\left (4\,a^{1/4}\,d-2\,\sqrt {2}\,{\left (-b\right )}^{1/4}\,c\right )}{8\,a^{3/4}\,\sqrt {-b}}+\frac {\sqrt {2}\,c\,\ln \left (\frac {\sqrt {-b}\,x^2+\sqrt {a}+\sqrt {2}\,a^{1/4}\,{\left (-b\right )}^{1/4}\,x}{\sqrt {-b}\,x^2+\sqrt {a}-\sqrt {2}\,a^{1/4}\,{\left (-b\right )}^{1/4}\,x}\right )}{8\,a^{3/4}\,{\left (-b\right )}^{1/4}} & \text {\ if\ \ }a\neq 0 \end {array}\right . \]
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