Optimal. Leaf size=29 \[ \frac {\tan ^{-1}\left (\frac {\sqrt {b} x^4}{\sqrt {a}}\right )}{4 \sqrt {a} \sqrt {b}} \]
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Rubi [A]
time = 0.01, antiderivative size = 29, normalized size of antiderivative = 1.00, number of steps
used = 2, number of rules used = 2, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {281, 211}
\begin {gather*} \frac {\text {ArcTan}\left (\frac {\sqrt {b} x^4}{\sqrt {a}}\right )}{4 \sqrt {a} \sqrt {b}} \end {gather*}
Antiderivative was successfully verified.
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Rule 211
Rule 281
Rubi steps
\begin {align*} \int \frac {x^3}{a+b x^8} \, dx &=\frac {1}{4} \text {Subst}\left (\int \frac {1}{a+b x^2} \, dx,x,x^4\right )\\ &=\frac {\tan ^{-1}\left (\frac {\sqrt {b} x^4}{\sqrt {a}}\right )}{4 \sqrt {a} \sqrt {b}}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 29, normalized size = 1.00 \begin {gather*} \frac {\tan ^{-1}\left (\frac {\sqrt {b} x^4}{\sqrt {a}}\right )}{4 \sqrt {a} \sqrt {b}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.18, size = 19, normalized size = 0.66
method | result | size |
default | \(\frac {\arctan \left (\frac {b \,x^{4}}{\sqrt {a b}}\right )}{4 \sqrt {a b}}\) | \(19\) |
risch | \(-\frac {\ln \left (x^{4} \sqrt {-a b}-a \right )}{8 \sqrt {-a b}}+\frac {\ln \left (x^{4} \sqrt {-a b}+a \right )}{8 \sqrt {-a b}}\) | \(46\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.49, size = 18, normalized size = 0.62 \begin {gather*} \frac {\arctan \left (\frac {b x^{4}}{\sqrt {a b}}\right )}{4 \, \sqrt {a b}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.36, size = 72, normalized size = 2.48 \begin {gather*} \left [-\frac {\sqrt {-a b} \log \left (\frac {b x^{8} - 2 \, \sqrt {-a b} x^{4} - a}{b x^{8} + a}\right )}{8 \, a b}, -\frac {\sqrt {a b} \arctan \left (\frac {\sqrt {a b}}{b x^{4}}\right )}{4 \, a b}\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. 56 vs.
\(2 (26) = 52\).
time = 0.10, size = 56, normalized size = 1.93 \begin {gather*} - \frac {\sqrt {- \frac {1}{a b}} \log {\left (- a \sqrt {- \frac {1}{a b}} + x^{4} \right )}}{8} + \frac {\sqrt {- \frac {1}{a b}} \log {\left (a \sqrt {- \frac {1}{a b}} + x^{4} \right )}}{8} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 1.09, size = 18, normalized size = 0.62 \begin {gather*} \frac {\arctan \left (\frac {b x^{4}}{\sqrt {a b}}\right )}{4 \, \sqrt {a b}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.06, size = 19, normalized size = 0.66 \begin {gather*} \frac {\mathrm {atan}\left (\frac {\sqrt {b}\,x^4}{\sqrt {a}}\right )}{4\,\sqrt {a}\,\sqrt {b}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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