Optimal. Leaf size=99 \[ \frac {(b+4 a x) \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {3 b^2 \text {ArcTan}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{b x^3+a x^4}}\right )}{16 a^{7/4}}-\frac {3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{b x^3+a x^4}}\right )}{16 a^{7/4}} \]
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Rubi [A]
time = 0.11, antiderivative size = 168, normalized size of antiderivative = 1.70, number of steps
used = 8, number of rules used = 8, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.533, Rules used = {2029, 2049,
2057, 65, 338, 304, 209, 212} \begin {gather*} \frac {3 b^2 x^{9/4} (a x+b)^{3/4} \text {ArcTan}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{a x+b}}\right )}{16 a^{7/4} \left (a x^4+b x^3\right )^{3/4}}-\frac {3 b^2 x^{9/4} (a x+b)^{3/4} \tanh ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{a x+b}}\right )}{16 a^{7/4} \left (a x^4+b x^3\right )^{3/4}}+\frac {1}{2} x \sqrt [4]{a x^4+b x^3}+\frac {b \sqrt [4]{a x^4+b x^3}}{8 a} \end {gather*}
Antiderivative was successfully verified.
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Rule 65
Rule 209
Rule 212
Rule 304
Rule 338
Rule 2029
Rule 2049
Rule 2057
Rubi steps
\begin {align*} \int \sqrt [4]{b x^3+a x^4} \, dx &=\frac {1}{2} x \sqrt [4]{b x^3+a x^4}+\frac {1}{8} b \int \frac {x^3}{\left (b x^3+a x^4\right )^{3/4}} \, dx\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}-\frac {\left (3 b^2\right ) \int \frac {x^2}{\left (b x^3+a x^4\right )^{3/4}} \, dx}{32 a}\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}-\frac {\left (3 b^2 x^{9/4} (b+a x)^{3/4}\right ) \int \frac {1}{\sqrt [4]{x} (b+a x)^{3/4}} \, dx}{32 a \left (b x^3+a x^4\right )^{3/4}}\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}-\frac {\left (3 b^2 x^{9/4} (b+a x)^{3/4}\right ) \text {Subst}\left (\int \frac {x^2}{\left (b+a x^4\right )^{3/4}} \, dx,x,\sqrt [4]{x}\right )}{8 a \left (b x^3+a x^4\right )^{3/4}}\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}-\frac {\left (3 b^2 x^{9/4} (b+a x)^{3/4}\right ) \text {Subst}\left (\int \frac {x^2}{1-a x^4} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{8 a \left (b x^3+a x^4\right )^{3/4}}\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}-\frac {\left (3 b^2 x^{9/4} (b+a x)^{3/4}\right ) \text {Subst}\left (\int \frac {1}{1-\sqrt {a} x^2} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{16 a^{3/2} \left (b x^3+a x^4\right )^{3/4}}+\frac {\left (3 b^2 x^{9/4} (b+a x)^{3/4}\right ) \text {Subst}\left (\int \frac {1}{1+\sqrt {a} x^2} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{16 a^{3/2} \left (b x^3+a x^4\right )^{3/4}}\\ &=\frac {b \sqrt [4]{b x^3+a x^4}}{8 a}+\frac {1}{2} x \sqrt [4]{b x^3+a x^4}+\frac {3 b^2 x^{9/4} (b+a x)^{3/4} \tan ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{16 a^{7/4} \left (b x^3+a x^4\right )^{3/4}}-\frac {3 b^2 x^{9/4} (b+a x)^{3/4} \tanh ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{16 a^{7/4} \left (b x^3+a x^4\right )^{3/4}}\\ \end {align*}
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Mathematica [A]
time = 0.34, size = 116, normalized size = 1.17 \begin {gather*} \frac {x^{9/4} (b+a x)^{3/4} \left (2 a^{3/4} x^{3/4} \sqrt [4]{b+a x} (b+4 a x)+3 b^2 \text {ArcTan}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )-3 b^2 \tanh ^{-1}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )\right )}{16 a^{7/4} \left (x^3 (b+a x)\right )^{3/4}} \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 0.01, size = 0, normalized size = 0.00 \[\int \left (a \,x^{4}+b \,x^{3}\right )^{\frac {1}{4}}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \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. 234 vs.
\(2 (79) = 158\).
time = 0.41, size = 234, normalized size = 2.36 \begin {gather*} \frac {12 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} \arctan \left (-\frac {{\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} a^{5} b^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {3}{4}} - a^{5} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {3}{4}} x \sqrt {\frac {a^{4} \sqrt {\frac {b^{8}}{a^{7}}} x^{2} + \sqrt {a x^{4} + b x^{3}} b^{4}}{x^{2}}}}{b^{8} x}\right ) - 3 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} \log \left (\frac {3 \, {\left (a^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} x + {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{2}\right )}}{x}\right ) + 3 \, a \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} \log \left (-\frac {3 \, {\left (a^{2} \left (\frac {b^{8}}{a^{7}}\right )^{\frac {1}{4}} x - {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{2}\right )}}{x}\right ) + 4 \, {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} {\left (4 \, a x + b\right )}}{32 \, a} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \sqrt [4]{a x^{4} + b x^{3}}\, dx \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. 243 vs.
\(2 (79) = 158\).
time = 0.41, size = 243, normalized size = 2.45 \begin {gather*} \frac {\frac {6 \, \sqrt {2} b^{3} \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} + 2 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{\left (-a\right )^{\frac {3}{4}} a} + \frac {6 \, \sqrt {2} b^{3} \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} - 2 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{\left (-a\right )^{\frac {3}{4}} a} + \frac {3 \, \sqrt {2} b^{3} \log \left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} + \sqrt {-a} + \sqrt {a + \frac {b}{x}}\right )}{\left (-a\right )^{\frac {3}{4}} a} + \frac {3 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{3} \log \left (-\sqrt {2} \left (-a\right )^{\frac {1}{4}} {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} + \sqrt {-a} + \sqrt {a + \frac {b}{x}}\right )}{a^{2}} + \frac {8 \, {\left ({\left (a + \frac {b}{x}\right )}^{\frac {5}{4}} b^{3} + 3 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} a b^{3}\right )} x^{2}}{a b^{2}}}{64 \, b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.86, size = 38, normalized size = 0.38 \begin {gather*} \frac {4\,x\,{\left (a\,x^4+b\,x^3\right )}^{1/4}\,{{}}_2{\mathrm {F}}_1\left (-\frac {1}{4},\frac {7}{4};\ \frac {11}{4};\ -\frac {a\,x}{b}\right )}{7\,{\left (\frac {a\,x}{b}+1\right )}^{1/4}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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