Optimal. Leaf size=74 \[ -\frac {2 \sqrt {a x+b x^4}}{15 a x^8}+\frac {8 b \sqrt {a x+b x^4}}{45 a^2 x^5}-\frac {16 b^2 \sqrt {a x+b x^4}}{45 a^3 x^2} \]
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Rubi [A]
time = 0.07, antiderivative size = 74, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 2, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.118, Rules used = {2041, 2039}
\begin {gather*} -\frac {16 b^2 \sqrt {a x+b x^4}}{45 a^3 x^2}+\frac {8 b \sqrt {a x+b x^4}}{45 a^2 x^5}-\frac {2 \sqrt {a x+b x^4}}{15 a x^8} \end {gather*}
Antiderivative was successfully verified.
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Rule 2039
Rule 2041
Rubi steps
\begin {align*} \int \frac {1}{x^8 \sqrt {a x+b x^4}} \, dx &=-\frac {2 \sqrt {a x+b x^4}}{15 a x^8}-\frac {(4 b) \int \frac {1}{x^5 \sqrt {a x+b x^4}} \, dx}{5 a}\\ &=-\frac {2 \sqrt {a x+b x^4}}{15 a x^8}+\frac {8 b \sqrt {a x+b x^4}}{45 a^2 x^5}+\frac {\left (8 b^2\right ) \int \frac {1}{x^2 \sqrt {a x+b x^4}} \, dx}{15 a^2}\\ &=-\frac {2 \sqrt {a x+b x^4}}{15 a x^8}+\frac {8 b \sqrt {a x+b x^4}}{45 a^2 x^5}-\frac {16 b^2 \sqrt {a x+b x^4}}{45 a^3 x^2}\\ \end {align*}
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Mathematica [A]
time = 1.22, size = 44, normalized size = 0.59 \begin {gather*} -\frac {2 \sqrt {x \left (a+b x^3\right )} \left (3 a^2-4 a b x^3+8 b^2 x^6\right )}{45 a^3 x^8} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.36, size = 63, normalized size = 0.85
method | result | size |
trager | \(-\frac {2 \left (8 b^{2} x^{6}-4 a b \,x^{3}+3 a^{2}\right ) \sqrt {b \,x^{4}+a x}}{45 a^{3} x^{8}}\) | \(41\) |
gosper | \(-\frac {2 \left (b \,x^{3}+a \right ) \left (8 b^{2} x^{6}-4 a b \,x^{3}+3 a^{2}\right )}{45 x^{7} a^{3} \sqrt {b \,x^{4}+a x}}\) | \(48\) |
risch | \(-\frac {2 \left (b \,x^{3}+a \right ) \left (8 b^{2} x^{6}-4 a b \,x^{3}+3 a^{2}\right )}{45 a^{3} x^{7} \sqrt {x \left (b \,x^{3}+a \right )}}\) | \(48\) |
default | \(-\frac {2 \sqrt {b \,x^{4}+a x}}{15 a \,x^{8}}+\frac {8 b \sqrt {b \,x^{4}+a x}}{45 a^{2} x^{5}}-\frac {16 b^{2} \sqrt {b \,x^{4}+a x}}{45 a^{3} x^{2}}\) | \(63\) |
elliptic | \(-\frac {2 \sqrt {b \,x^{4}+a x}}{15 a \,x^{8}}+\frac {8 b \sqrt {b \,x^{4}+a x}}{45 a^{2} x^{5}}-\frac {16 b^{2} \sqrt {b \,x^{4}+a x}}{45 a^{3} x^{2}}\) | \(63\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.30, size = 50, normalized size = 0.68 \begin {gather*} -\frac {2 \, {\left (8 \, b^{3} x^{10} + 4 \, a b^{2} x^{7} - a^{2} b x^{4} + 3 \, a^{3} x\right )}}{45 \, \sqrt {b x^{3} + a} a^{3} x^{\frac {17}{2}}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 1.81, size = 40, normalized size = 0.54 \begin {gather*} -\frac {2 \, {\left (8 \, b^{2} x^{6} - 4 \, a b x^{3} + 3 \, a^{2}\right )} \sqrt {b x^{4} + a x}}{45 \, a^{3} x^{8}} \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 \frac {1}{x^{8} \sqrt {x \left (a + b x^{3}\right )}}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.81, size = 47, normalized size = 0.64 \begin {gather*} -\frac {2 \, \sqrt {b + \frac {a}{x^{3}}} b^{2}}{3 \, a^{3}} - \frac {2 \, {\left (3 \, {\left (b + \frac {a}{x^{3}}\right )}^{\frac {5}{2}} - 10 \, {\left (b + \frac {a}{x^{3}}\right )}^{\frac {3}{2}} b\right )}}{45 \, a^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 5.27, size = 40, normalized size = 0.54 \begin {gather*} -\frac {2\,\sqrt {b\,x^4+a\,x}\,\left (3\,a^2-4\,a\,b\,x^3+8\,b^2\,x^6\right )}{45\,a^3\,x^8} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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