Optimal. Leaf size=35 \[ \frac {\tanh ^{-1}\left (\frac {b-2 c x^2}{\sqrt {b^2-4 a c}}\right )}{\sqrt {b^2-4 a c}} \]
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Rubi [A]
time = 0.03, antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.176, Rules used = {1121, 632, 212}
\begin {gather*} \frac {\tanh ^{-1}\left (\frac {b-2 c x^2}{\sqrt {b^2-4 a c}}\right )}{\sqrt {b^2-4 a c}} \end {gather*}
Antiderivative was successfully verified.
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Rule 212
Rule 632
Rule 1121
Rubi steps
\begin {align*} \int \frac {x}{a-b x^2+c x^4} \, dx &=\frac {1}{2} \text {Subst}\left (\int \frac {1}{a-b x+c x^2} \, dx,x,x^2\right )\\ &=-\text {Subst}\left (\int \frac {1}{b^2-4 a c-x^2} \, dx,x,-b+2 c x^2\right )\\ &=-\frac {\tanh ^{-1}\left (\frac {-b+2 c x^2}{\sqrt {b^2-4 a c}}\right )}{\sqrt {b^2-4 a c}}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 41, normalized size = 1.17 \begin {gather*} \frac {\tan ^{-1}\left (\frac {-b+2 c x^2}{\sqrt {-b^2+4 a c}}\right )}{\sqrt {-b^2+4 a c}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.01, size = 38, normalized size = 1.09
method | result | size |
default | \(\frac {\arctan \left (\frac {2 c \,x^{2}-b}{\sqrt {4 a c -b^{2}}}\right )}{\sqrt {4 a c -b^{2}}}\) | \(38\) |
risch | \(-\frac {\ln \left (\left (b +\sqrt {-4 a c +b^{2}}\right ) x^{2}-2 a \right )}{2 \sqrt {-4 a c +b^{2}}}+\frac {\ln \left (\left (-b +\sqrt {-4 a c +b^{2}}\right ) x^{2}+2 a \right )}{2 \sqrt {-4 a c +b^{2}}}\) | \(70\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Exception raised: ValueError} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.33, size = 134, normalized size = 3.83 \begin {gather*} \left [\frac {\log \left (\frac {2 \, c^{2} x^{4} - 2 \, b c x^{2} + b^{2} - 2 \, a c - {\left (2 \, c x^{2} - b\right )} \sqrt {b^{2} - 4 \, a c}}{c x^{4} - b x^{2} + a}\right )}{2 \, \sqrt {b^{2} - 4 \, a c}}, -\frac {\sqrt {-b^{2} + 4 \, a c} \arctan \left (-\frac {{\left (2 \, c x^{2} - b\right )} \sqrt {-b^{2} + 4 \, a c}}{b^{2} - 4 \, a c}\right )}{b^{2} - 4 \, a c}\right ] \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] Leaf count of result is larger than twice the leaf count of optimal. 131 vs.
\(2 (32) = 64\).
time = 0.26, size = 131, normalized size = 3.74 \begin {gather*} - \frac {\sqrt {- \frac {1}{4 a c - b^{2}}} \log {\left (x^{2} + \frac {- 4 a c \sqrt {- \frac {1}{4 a c - b^{2}}} + b^{2} \sqrt {- \frac {1}{4 a c - b^{2}}} - b}{2 c} \right )}}{2} + \frac {\sqrt {- \frac {1}{4 a c - b^{2}}} \log {\left (x^{2} + \frac {4 a c \sqrt {- \frac {1}{4 a c - b^{2}}} - b^{2} \sqrt {- \frac {1}{4 a c - b^{2}}} - b}{2 c} \right )}}{2} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 3.86, size = 37, normalized size = 1.06 \begin {gather*} \frac {\arctan \left (\frac {2 \, c x^{2} - b}{\sqrt {-b^{2} + 4 \, a c}}\right )}{\sqrt {-b^{2} + 4 \, a c}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 4.30, size = 42, normalized size = 1.20 \begin {gather*} -\frac {\mathrm {atan}\left (\frac {a\,b-2\,a\,c\,x^2}{a\,\sqrt {4\,a\,c-b^2}}\right )}{\sqrt {4\,a\,c-b^2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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