Optimal. Leaf size=25 \[ \frac{1}{3} \tanh ^{-1}\left (\frac{3 x+1}{\sqrt{9 x^2+6 x-8}}\right ) \]
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Rubi [A] time = 0.0058126, antiderivative size = 25, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 14, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.143, Rules used = {621, 206} \[ \frac{1}{3} \tanh ^{-1}\left (\frac{3 x+1}{\sqrt{9 x^2+6 x-8}}\right ) \]
Antiderivative was successfully verified.
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Rule 621
Rule 206
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{-8+6 x+9 x^2}} \, dx &=2 \operatorname{Subst}\left (\int \frac{1}{36-x^2} \, dx,x,\frac{6+18 x}{\sqrt{-8+6 x+9 x^2}}\right )\\ &=\frac{1}{3} \tanh ^{-1}\left (\frac{1+3 x}{\sqrt{-8+6 x+9 x^2}}\right )\\ \end{align*}
Mathematica [A] time = 0.0059543, size = 24, normalized size = 0.96 \[ \frac{1}{3} \log \left (\sqrt{9 x^2+6 x-8}+3 x+1\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 30, normalized size = 1.2 \begin{align*}{\frac{\sqrt{9}}{9}\ln \left ({\frac{ \left ( 3+9\,x \right ) \sqrt{9}}{9}}+\sqrt{9\,{x}^{2}+6\,x-8} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.40184, size = 30, normalized size = 1.2 \begin{align*} \frac{1}{3} \, \log \left (18 \, x + 6 \, \sqrt{9 \, x^{2} + 6 \, x - 8} + 6\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.08571, size = 59, normalized size = 2.36 \begin{align*} -\frac{1}{3} \, \log \left (-3 \, x + \sqrt{9 \, x^{2} + 6 \, x - 8} - 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{9 x^{2} + 6 x - 8}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.04942, size = 28, normalized size = 1.12 \begin{align*} -\frac{1}{3} \, \log \left ({\left | -3 \, x + \sqrt{9 \, x^{2} + 6 \, x - 8} - 1 \right |}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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