Optimal. Leaf size=14 \[ 2 \text{EllipticF}\left (\sin ^{-1}\left (\frac{1}{\sqrt{3-x}}\right ),2\right ) \]
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Rubi [A] time = 0.005414, antiderivative size = 14, normalized size of antiderivative = 1., number of steps used = 1, number of rules used = 1, integrand size = 28, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.036, Rules used = {118} \[ 2 F\left (\left .\sin ^{-1}\left (\frac{1}{\sqrt{3-x}}\right )\right |2\right ) \]
Antiderivative was successfully verified.
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Rule 118
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{1-x} \sqrt{2-x} \sqrt{3-x}} \, dx &=2 F\left (\left .\sin ^{-1}\left (\frac{1}{\sqrt{3-x}}\right )\right |2\right )\\ \end{align*}
Mathematica [C] time = 0.0344898, size = 67, normalized size = 4.79 \[ \frac{2 i \sqrt{\frac{x-3}{x-1}} \sqrt{\frac{x-2}{x-1}} (x-1) \text{EllipticF}\left (i \sinh ^{-1}\left (\frac{1}{\sqrt{1-x}}\right ),2\right )}{\sqrt{2-x} \sqrt{3-x}} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.04, size = 55, normalized size = 3.9 \begin{align*} -{\frac{\sqrt{2}}{2\,{x}^{2}-6\,x+4}{\it EllipticF} \left ( \sqrt{3-x},{\frac{\sqrt{2}}{2}} \right ) \sqrt{-2+x}\sqrt{-2+2\,x}\sqrt{2-x}\sqrt{-2\,x+2}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{-x + 3} \sqrt{-x + 2} \sqrt{-x + 1}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (-\frac{\sqrt{-x + 3} \sqrt{-x + 2} \sqrt{-x + 1}}{x^{3} - 6 \, x^{2} + 11 \, x - 6}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [C] time = 6.88725, size = 66, normalized size = 4.71 \begin{align*} \frac{{G_{6, 6}^{5, 3}\left (\begin{matrix} \frac{1}{2}, 1, 1 & \frac{3}{4}, \frac{3}{4}, \frac{5}{4} \\\frac{1}{4}, \frac{1}{2}, \frac{3}{4}, 1, \frac{5}{4} & 0 \end{matrix} \middle |{\frac{e^{- 2 i \pi }}{\left (x - 2\right )^{2}}} \right )}}{4 \pi ^{\frac{3}{2}}} - \frac{{G_{6, 6}^{3, 5}\left (\begin{matrix} - \frac{1}{4}, 0, \frac{1}{4}, \frac{1}{2}, \frac{3}{4} & 1 \\0, \frac{1}{2}, 0 & - \frac{1}{4}, \frac{1}{4}, \frac{1}{4} \end{matrix} \middle |{\frac{1}{\left (x - 2\right )^{2}}} \right )}}{4 \pi ^{\frac{3}{2}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{-x + 3} \sqrt{-x + 2} \sqrt{-x + 1}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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