Integrand size = 22, antiderivative size = 68 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {b}{a^2 \sqrt {d x^2}}-\frac {1}{3 a x^2 \sqrt {d x^2}}+\frac {b^{3/2} x \arctan \left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{a^{5/2} \sqrt {d x^2}} \]
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Time = 0.02 (sec) , antiderivative size = 68, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.136, Rules used = {15, 331, 211} \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {b^{3/2} x \arctan \left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{a^{5/2} \sqrt {d x^2}}+\frac {b}{a^2 \sqrt {d x^2}}-\frac {1}{3 a x^2 \sqrt {d x^2}} \]
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Rule 15
Rule 211
Rule 331
Rubi steps \begin{align*} \text {integral}& = \frac {x \int \frac {1}{x^4 \left (a+b x^2\right )} \, dx}{\sqrt {d x^2}} \\ & = -\frac {1}{3 a x^2 \sqrt {d x^2}}-\frac {(b x) \int \frac {1}{x^2 \left (a+b x^2\right )} \, dx}{a \sqrt {d x^2}} \\ & = \frac {b}{a^2 \sqrt {d x^2}}-\frac {1}{3 a x^2 \sqrt {d x^2}}+\frac {\left (b^2 x\right ) \int \frac {1}{a+b x^2} \, dx}{a^2 \sqrt {d x^2}} \\ & = \frac {b}{a^2 \sqrt {d x^2}}-\frac {1}{3 a x^2 \sqrt {d x^2}}+\frac {b^{3/2} x \tan ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{a^{5/2} \sqrt {d x^2}} \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 70, normalized size of antiderivative = 1.03 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {d \left (-a+3 b x^2\right )}{3 a^2 \left (d x^2\right )^{3/2}}+\frac {b^{3/2} \arctan \left (\frac {\sqrt {b} \sqrt {d x^2}}{\sqrt {a} \sqrt {d}}\right )}{a^{5/2} \sqrt {d}} \]
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Time = 2.97 (sec) , antiderivative size = 57, normalized size of antiderivative = 0.84
method | result | size |
default | \(-\frac {-3 b^{2} \arctan \left (\frac {b x}{\sqrt {a b}}\right ) x^{3}-3 \sqrt {a b}\, b \,x^{2}+\sqrt {a b}\, a}{3 x^{2} \sqrt {d \,x^{2}}\, a^{2} \sqrt {a b}}\) | \(57\) |
pseudoelliptic | \(\frac {\arctan \left (\frac {b \sqrt {d \,x^{2}}}{\sqrt {a b d}}\right ) b^{2} x^{2} \sqrt {d \,x^{2}}-\frac {\left (-3 b \,x^{2}+a \right ) \sqrt {a b d}}{3}}{\sqrt {d \,x^{2}}\, \sqrt {a b d}\, a^{2} x^{2}}\) | \(68\) |
risch | \(\frac {\frac {b \,x^{2}}{a^{2}}-\frac {1}{3 a}}{\sqrt {d \,x^{2}}\, x^{2}}+\frac {x \sqrt {-a b}\, b \ln \left (-b x -\sqrt {-a b}\right )}{2 \sqrt {d \,x^{2}}\, a^{3}}-\frac {x \sqrt {-a b}\, b \ln \left (-b x +\sqrt {-a b}\right )}{2 \sqrt {d \,x^{2}}\, a^{3}}\) | \(93\) |
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Time = 0.26 (sec) , antiderivative size = 157, normalized size of antiderivative = 2.31 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\left [\frac {3 \, b d x^{4} \sqrt {-\frac {b}{a d}} \log \left (\frac {b x^{2} + 2 \, \sqrt {d x^{2}} a \sqrt {-\frac {b}{a d}} - a}{b x^{2} + a}\right ) + 2 \, {\left (3 \, b x^{2} - a\right )} \sqrt {d x^{2}}}{6 \, a^{2} d x^{4}}, \frac {3 \, b d x^{4} \sqrt {\frac {b}{a d}} \arctan \left (\sqrt {d x^{2}} \sqrt {\frac {b}{a d}}\right ) + {\left (3 \, b x^{2} - a\right )} \sqrt {d x^{2}}}{3 \, a^{2} d x^{4}}\right ] \]
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Time = 1.14 (sec) , antiderivative size = 70, normalized size of antiderivative = 1.03 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\begin {cases} \frac {2 \left (- \frac {d^{2}}{6 a \left (d x^{2}\right )^{\frac {3}{2}}} + \frac {b d \operatorname {atan}{\left (\frac {\sqrt {d x^{2}}}{\sqrt {\frac {a d}{b}}} \right )}}{2 a^{2} \sqrt {\frac {a d}{b}}} + \frac {b d}{2 a^{2} \sqrt {d x^{2}}}\right )}{d} & \text {for}\: d \neq 0 \\\tilde {\infty } x^{2} & \text {otherwise} \end {cases} \]
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Time = 0.32 (sec) , antiderivative size = 52, normalized size of antiderivative = 0.76 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {b^{2} \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{\sqrt {a b} a^{2} \sqrt {d}} + \frac {3 \, b \sqrt {d} x^{2} - a \sqrt {d}}{3 \, a^{2} d x^{3}} \]
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Time = 0.30 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.79 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {b^{2} \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{\sqrt {a b} a^{2} \sqrt {d} \mathrm {sgn}\left (x\right )} + \frac {3 \, b x^{2} - a}{3 \, a^{2} \sqrt {d} x^{3} \mathrm {sgn}\left (x\right )} \]
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Time = 5.34 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.78 \[ \int \frac {1}{x^3 \sqrt {d x^2} \left (a+b x^2\right )} \, dx=\frac {b^{3/2}\,\mathrm {atan}\left (\frac {\sqrt {b}\,\sqrt {x^2}}{\sqrt {a}}\right )}{a^{5/2}\,\sqrt {d}}-\frac {1}{3\,a\,\sqrt {d}\,{\left (x^2\right )}^{3/2}}+\frac {b\,x^2}{a^2\,\sqrt {d}\,{\left (x^2\right )}^{3/2}} \]
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