Optimal. Leaf size=62 \[ \frac {f^{\frac {c}{(a+b x)^2}} (a+b x)}{b}-\frac {\sqrt {c} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {c} \sqrt {\log (f)}}{a+b x}\right ) \sqrt {\log (f)}}{b} \]
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Rubi [A]
time = 0.03, antiderivative size = 62, normalized size of antiderivative = 1.00, number of steps
used = 3, number of rules used = 3, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {2237, 2242,
2235} \begin {gather*} \frac {(a+b x) f^{\frac {c}{(a+b x)^2}}}{b}-\frac {\sqrt {\pi } \sqrt {c} \sqrt {\log (f)} \text {Erfi}\left (\frac {\sqrt {c} \sqrt {\log (f)}}{a+b x}\right )}{b} \end {gather*}
Antiderivative was successfully verified.
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Rule 2235
Rule 2237
Rule 2242
Rubi steps
\begin {align*} \int f^{\frac {c}{(a+b x)^2}} \, dx &=\frac {f^{\frac {c}{(a+b x)^2}} (a+b x)}{b}+(2 c \log (f)) \int \frac {f^{\frac {c}{(a+b x)^2}}}{(a+b x)^2} \, dx\\ &=\frac {f^{\frac {c}{(a+b x)^2}} (a+b x)}{b}-\frac {(2 c \log (f)) \text {Subst}\left (\int f^{c x^2} \, dx,x,\frac {1}{a+b x}\right )}{b}\\ &=\frac {f^{\frac {c}{(a+b x)^2}} (a+b x)}{b}-\frac {\sqrt {c} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {c} \sqrt {\log (f)}}{a+b x}\right ) \sqrt {\log (f)}}{b}\\ \end {align*}
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Mathematica [A]
time = 0.02, size = 62, normalized size = 1.00 \begin {gather*} \frac {f^{\frac {c}{(a+b x)^2}} (a+b x)}{b}-\frac {\sqrt {c} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {c} \sqrt {\log (f)}}{a+b x}\right ) \sqrt {\log (f)}}{b} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.02, size = 65, normalized size = 1.05
method | result | size |
risch | \(f^{\frac {c}{\left (b x +a \right )^{2}}} x +\frac {f^{\frac {c}{\left (b x +a \right )^{2}}} a}{b}-\frac {\ln \left (f \right ) c \sqrt {\pi }\, \erf \left (\frac {\sqrt {-c \ln \left (f \right )}}{b x +a}\right )}{b \sqrt {-c \ln \left (f \right )}}\) | \(65\) |
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 [A]
time = 0.42, size = 68, normalized size = 1.10 \begin {gather*} \frac {\sqrt {\pi } b \sqrt {-\frac {c \log \left (f\right )}{b^{2}}} \operatorname {erf}\left (\frac {b \sqrt {-\frac {c \log \left (f\right )}{b^{2}}}}{b x + a}\right ) + {\left (b x + a\right )} f^{\frac {c}{b^{2} x^{2} + 2 \, a b x + a^{2}}}}{b} \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 f^{\frac {c}{\left (a + b x\right )^{2}}}\, dx \end {gather*}
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 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 3.64, size = 53, normalized size = 0.85 \begin {gather*} \frac {f^{\frac {c}{{\left (a+b\,x\right )}^2}}\,\left (a+b\,x\right )}{b}-\frac {c\,\sqrt {\pi }\,\mathrm {erfi}\left (\frac {\sqrt {c\,\ln \left (f\right )}}{a+b\,x}\right )\,\ln \left (f\right )}{b\,\sqrt {c\,\ln \left (f\right )}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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