Optimal. Leaf size=39 \[ -\frac {f^a \left (-b \log (f) x^n\right )^{3/n} \Gamma \left (-\frac {3}{n},-b x^n \log (f)\right )}{n x^3} \]
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Rubi [A] time = 0.02, antiderivative size = 39, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.077, Rules used = {2218} \[ -\frac {f^a \left (-b \log (f) x^n\right )^{3/n} \text {Gamma}\left (-\frac {3}{n},-b \log (f) x^n\right )}{n x^3} \]
Antiderivative was successfully verified.
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Rule 2218
Rubi steps
\begin {align*} \int \frac {f^{a+b x^n}}{x^4} \, dx &=-\frac {f^a \Gamma \left (-\frac {3}{n},-b x^n \log (f)\right ) \left (-b x^n \log (f)\right )^{3/n}}{n x^3}\\ \end {align*}
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Mathematica [A] time = 0.00, size = 39, normalized size = 1.00 \[ -\frac {f^a \left (-b \log (f) x^n\right )^{3/n} \Gamma \left (-\frac {3}{n},-b x^n \log (f)\right )}{n x^3} \]
Antiderivative was successfully verified.
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fricas [F] time = 0.40, size = 0, normalized size = 0.00 \[ {\rm integral}\left (\frac {f^{b x^{n} + a}}{x^{4}}, x\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {f^{b x^{n} + a}}{x^{4}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [F] time = 0.04, size = 0, normalized size = 0.00 \[ \int \frac {f^{b \,x^{n}+a}}{x^{4}}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.14, size = 39, normalized size = 1.00 \[ -\frac {\left (-b x^{n} \log \relax (f)\right )^{\frac {3}{n}} f^{a} \Gamma \left (-\frac {3}{n}, -b x^{n} \log \relax (f)\right )}{n x^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 3.48, size = 52, normalized size = 1.33 \[ -\frac {f^a\,{\mathrm {e}}^{\frac {b\,x^n\,\ln \relax (f)}{2}}\,{\mathrm {M}}_{\frac {3}{2\,n}+\frac {1}{2},-\frac {3}{2\,n}}\left (b\,x^n\,\ln \relax (f)\right )\,{\left (b\,x^n\,\ln \relax (f)\right )}^{\frac {3}{2\,n}-\frac {1}{2}}}{3\,x^3} \]
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 \[ \begin {cases} \frac {b f^{a} f^{b x^{n}} n x^{n} \log {\relax (f )}}{3 n x^{3} - 9 x^{3}} - \frac {f^{a} f^{b x^{n}} n}{3 n x^{3} - 9 x^{3}} + \frac {3 f^{a} f^{b x^{n}}}{3 n x^{3} - 9 x^{3}} & \text {for}\: n \neq 3 \\\int \frac {f^{a + b x^{3}}}{x^{4}}\, dx & \text {otherwise} \end {cases} \]
Verification of antiderivative is not currently implemented for this CAS.
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