Optimal. Leaf size=105 \[ -\frac {\sqrt [4]{a-b x^4}}{8 x^8}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}+\frac {3 b^2 \tan ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}+\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}} \]
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Rubi [A]
time = 0.04, antiderivative size = 105, normalized size of antiderivative = 1.00, number of steps
used = 7, number of rules used = 7, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.438, Rules used = {272, 43, 44, 65,
218, 212, 209} \begin {gather*} \frac {3 b^2 \text {ArcTan}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}+\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}-\frac {\sqrt [4]{a-b x^4}}{8 x^8} \end {gather*}
Antiderivative was successfully verified.
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Rule 43
Rule 44
Rule 65
Rule 209
Rule 212
Rule 218
Rule 272
Rubi steps
\begin {align*} \int \frac {\sqrt [4]{a-b x^4}}{x^9} \, dx &=\frac {1}{4} \text {Subst}\left (\int \frac {\sqrt [4]{a-b x}}{x^3} \, dx,x,x^4\right )\\ &=-\frac {\sqrt [4]{a-b x^4}}{8 x^8}-\frac {1}{32} b \text {Subst}\left (\int \frac {1}{x^2 (a-b x)^{3/4}} \, dx,x,x^4\right )\\ &=-\frac {\sqrt [4]{a-b x^4}}{8 x^8}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}-\frac {\left (3 b^2\right ) \text {Subst}\left (\int \frac {1}{x (a-b x)^{3/4}} \, dx,x,x^4\right )}{128 a}\\ &=-\frac {\sqrt [4]{a-b x^4}}{8 x^8}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}+\frac {(3 b) \text {Subst}\left (\int \frac {1}{\frac {a}{b}-\frac {x^4}{b}} \, dx,x,\sqrt [4]{a-b x^4}\right )}{32 a}\\ &=-\frac {\sqrt [4]{a-b x^4}}{8 x^8}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}+\frac {\left (3 b^2\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a}-x^2} \, dx,x,\sqrt [4]{a-b x^4}\right )}{64 a^{3/2}}+\frac {\left (3 b^2\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a}+x^2} \, dx,x,\sqrt [4]{a-b x^4}\right )}{64 a^{3/2}}\\ &=-\frac {\sqrt [4]{a-b x^4}}{8 x^8}+\frac {b \sqrt [4]{a-b x^4}}{32 a x^4}+\frac {3 b^2 \tan ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}+\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}\\ \end {align*}
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Mathematica [A]
time = 0.14, size = 94, normalized size = 0.90 \begin {gather*} \frac {\sqrt [4]{a-b x^4} \left (-4 a+b x^4\right )}{32 a x^8}+\frac {3 b^2 \tan ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}}+\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a-b x^4}}{\sqrt [4]{a}}\right )}{64 a^{7/4}} \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 0.00, size = 0, normalized size = 0.00 \[\int \frac {\left (-b \,x^{4}+a \right )^{\frac {1}{4}}}{x^{9}}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.50, size = 138, normalized size = 1.31 \begin {gather*} -\frac {{\left (-b x^{4} + a\right )}^{\frac {5}{4}} b^{2} + 3 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}} a b^{2}}{32 \, {\left ({\left (b x^{4} - a\right )}^{2} a + 2 \, {\left (b x^{4} - a\right )} a^{2} + a^{3}\right )}} + \frac {3 \, {\left (\frac {2 \, b^{2} \arctan \left (\frac {{\left (-b x^{4} + a\right )}^{\frac {1}{4}}}{a^{\frac {1}{4}}}\right )}{a^{\frac {3}{4}}} - \frac {b^{2} \log \left (\frac {{\left (-b x^{4} + a\right )}^{\frac {1}{4}} - a^{\frac {1}{4}}}{{\left (-b x^{4} + a\right )}^{\frac {1}{4}} + a^{\frac {1}{4}}}\right )}{a^{\frac {3}{4}}}\right )}}{128 \, a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 214 vs.
\(2 (81) = 162\).
time = 0.41, size = 214, normalized size = 2.04 \begin {gather*} -\frac {12 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} x^{8} \arctan \left (-\frac {{\left (-b x^{4} + a\right )}^{\frac {1}{4}} a^{5} b^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {3}{4}} - \sqrt {\sqrt {-b x^{4} + a} b^{4} + a^{4} \sqrt {\frac {b^{8}}{a^{7}}}} a^{5} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {3}{4}}}{b^{8}}\right ) - 3 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} x^{8} \log \left (3 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}} b^{2} + 3 \, a^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}}\right ) + 3 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} x^{8} \log \left (3 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}} b^{2} - 3 \, a^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}}\right ) - 4 \, {\left (b x^{4} - 4 \, a\right )} {\left (-b x^{4} + a\right )}^{\frac {1}{4}}}{128 \, a x^{8}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] Result contains complex when optimal does not.
time = 1.22, size = 42, normalized size = 0.40 \begin {gather*} - \frac {\sqrt [4]{b} e^{\frac {i \pi }{4}} \Gamma \left (\frac {7}{4}\right ) {{}_{2}F_{1}\left (\begin {matrix} - \frac {1}{4}, \frac {7}{4} \\ \frac {11}{4} \end {matrix}\middle | {\frac {a}{b x^{4}}} \right )}}{4 x^{7} \Gamma \left (\frac {11}{4}\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 251 vs.
\(2 (81) = 162\).
time = 0.65, size = 251, normalized size = 2.39 \begin {gather*} \frac {\frac {6 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{3} \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} + 2 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{a^{2}} + \frac {6 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{3} \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} - 2 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{a^{2}} + \frac {3 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{3} \log \left (\sqrt {2} {\left (-b x^{4} + a\right )}^{\frac {1}{4}} \left (-a\right )^{\frac {1}{4}} + \sqrt {-b x^{4} + a} + \sqrt {-a}\right )}{a^{2}} + \frac {3 \, \sqrt {2} b^{3} \log \left (-\sqrt {2} {\left (-b x^{4} + a\right )}^{\frac {1}{4}} \left (-a\right )^{\frac {1}{4}} + \sqrt {-b x^{4} + a} + \sqrt {-a}\right )}{\left (-a\right )^{\frac {3}{4}} a} - \frac {8 \, {\left ({\left (-b x^{4} + a\right )}^{\frac {5}{4}} b^{3} + 3 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}} a b^{3}\right )}}{a b^{2} x^{8}}}{256 \, b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 1.45, size = 83, normalized size = 0.79 \begin {gather*} \frac {3\,b^2\,\mathrm {atan}\left (\frac {{\left (a-b\,x^4\right )}^{1/4}}{a^{1/4}}\right )}{64\,a^{7/4}}-\frac {3\,{\left (a-b\,x^4\right )}^{1/4}}{32\,x^8}-\frac {{\left (a-b\,x^4\right )}^{5/4}}{32\,a\,x^8}-\frac {b^2\,\mathrm {atan}\left (\frac {{\left (a-b\,x^4\right )}^{1/4}\,1{}\mathrm {i}}{a^{1/4}}\right )\,3{}\mathrm {i}}{64\,a^{7/4}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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