Optimal. Leaf size=44 \[ \frac{1}{3} \left (x^2-1\right )^{3/2}+\frac{1}{2} x \sqrt{x^2-1}-\frac{1}{2} \tanh ^{-1}\left (\frac{x}{\sqrt{x^2-1}}\right ) \]
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Rubi [A] time = 0.0069667, antiderivative size = 44, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 13, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.308, Rules used = {641, 195, 217, 206} \[ \frac{1}{3} \left (x^2-1\right )^{3/2}+\frac{1}{2} x \sqrt{x^2-1}-\frac{1}{2} \tanh ^{-1}\left (\frac{x}{\sqrt{x^2-1}}\right ) \]
Antiderivative was successfully verified.
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Rule 641
Rule 195
Rule 217
Rule 206
Rubi steps
\begin{align*} \int (1+x) \sqrt{-1+x^2} \, dx &=\frac{1}{3} \left (-1+x^2\right )^{3/2}+\int \sqrt{-1+x^2} \, dx\\ &=\frac{1}{2} x \sqrt{-1+x^2}+\frac{1}{3} \left (-1+x^2\right )^{3/2}-\frac{1}{2} \int \frac{1}{\sqrt{-1+x^2}} \, dx\\ &=\frac{1}{2} x \sqrt{-1+x^2}+\frac{1}{3} \left (-1+x^2\right )^{3/2}-\frac{1}{2} \operatorname{Subst}\left (\int \frac{1}{1-x^2} \, dx,x,\frac{x}{\sqrt{-1+x^2}}\right )\\ &=\frac{1}{2} x \sqrt{-1+x^2}+\frac{1}{3} \left (-1+x^2\right )^{3/2}-\frac{1}{2} \tanh ^{-1}\left (\frac{x}{\sqrt{-1+x^2}}\right )\\ \end{align*}
Mathematica [A] time = 0.0313316, size = 49, normalized size = 1.11 \[ \frac{\left (x^2-1\right ) \left (\sqrt{1-x^2} \left (2 x^2+3 x-2\right )+3 \sin ^{-1}(x)\right )}{6 \sqrt{-\left (x^2-1\right )^2}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.04, size = 33, normalized size = 0.8 \begin{align*}{\frac{x}{2}\sqrt{{x}^{2}-1}}-{\frac{1}{2}\ln \left ( x+\sqrt{{x}^{2}-1} \right ) }+{\frac{1}{3} \left ({x}^{2}-1 \right ) ^{{\frac{3}{2}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.02171, size = 49, normalized size = 1.11 \begin{align*} \frac{1}{3} \,{\left (x^{2} - 1\right )}^{\frac{3}{2}} + \frac{1}{2} \, \sqrt{x^{2} - 1} x - \frac{1}{2} \, \log \left (2 \, x + 2 \, \sqrt{x^{2} - 1}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.13397, size = 90, normalized size = 2.05 \begin{align*} \frac{1}{6} \,{\left (2 \, x^{2} + 3 \, x - 2\right )} \sqrt{x^{2} - 1} + \frac{1}{2} \, \log \left (-x + \sqrt{x^{2} - 1}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.202426, size = 39, normalized size = 0.89 \begin{align*} \frac{x^{2} \sqrt{x^{2} - 1}}{3} + \frac{x \sqrt{x^{2} - 1}}{2} - \frac{\sqrt{x^{2} - 1}}{3} - \frac{\operatorname{acosh}{\left (x \right )}}{2} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.33293, size = 46, normalized size = 1.05 \begin{align*} \frac{1}{6} \,{\left ({\left (2 \, x + 3\right )} x - 2\right )} \sqrt{x^{2} - 1} + \frac{1}{2} \, \log \left ({\left | -x + \sqrt{x^{2} - 1} \right |}\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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