3.39 \(\int \frac{1}{\sqrt{3-5 x^2-2 x^4}} \, dx\)

Optimal. Leaf size=18 \[ \frac{\text{EllipticF}\left (\sin ^{-1}\left (\sqrt{2} x\right ),-\frac{1}{6}\right )}{\sqrt{6}} \]

[Out]

EllipticF[ArcSin[Sqrt[2]*x], -1/6]/Sqrt[6]

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Rubi [A]  time = 0.0122699, antiderivative size = 18, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.125, Rules used = {1095, 419} \[ \frac{F\left (\sin ^{-1}\left (\sqrt{2} x\right )|-\frac{1}{6}\right )}{\sqrt{6}} \]

Antiderivative was successfully verified.

[In]

Int[1/Sqrt[3 - 5*x^2 - 2*x^4],x]

[Out]

EllipticF[ArcSin[Sqrt[2]*x], -1/6]/Sqrt[6]

Rule 1095

Int[1/Sqrt[(a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4], x_Symbol] :> With[{q = Rt[b^2 - 4*a*c, 2]}, Dist[2*Sqrt[-c], I
nt[1/(Sqrt[b + q + 2*c*x^2]*Sqrt[-b + q - 2*c*x^2]), x], x]] /; FreeQ[{a, b, c}, x] && GtQ[b^2 - 4*a*c, 0] &&
LtQ[c, 0]

Rule 419

Int[1/(Sqrt[(a_) + (b_.)*(x_)^2]*Sqrt[(c_) + (d_.)*(x_)^2]), x_Symbol] :> Simp[(1*EllipticF[ArcSin[Rt[-(d/c),
2]*x], (b*c)/(a*d)])/(Sqrt[a]*Sqrt[c]*Rt[-(d/c), 2]), x] /; FreeQ[{a, b, c, d}, x] && NegQ[d/c] && GtQ[c, 0] &
& GtQ[a, 0] &&  !(NegQ[b/a] && SimplerSqrtQ[-(b/a), -(d/c)])

Rubi steps

\begin{align*} \int \frac{1}{\sqrt{3-5 x^2-2 x^4}} \, dx &=\left (2 \sqrt{2}\right ) \int \frac{1}{\sqrt{2-4 x^2} \sqrt{12+4 x^2}} \, dx\\ &=\frac{F\left (\sin ^{-1}\left (\sqrt{2} x\right )|-\frac{1}{6}\right )}{\sqrt{6}}\\ \end{align*}

Mathematica [B]  time = 0.0243992, size = 54, normalized size = 3. \[ \frac{\sqrt{1-2 x^2} \sqrt{x^2+3} \text{EllipticF}\left (\sin ^{-1}\left (\sqrt{2} x\right ),-\frac{1}{6}\right )}{\sqrt{6} \sqrt{-2 x^4-5 x^2+3}} \]

Antiderivative was successfully verified.

[In]

Integrate[1/Sqrt[3 - 5*x^2 - 2*x^4],x]

[Out]

(Sqrt[1 - 2*x^2]*Sqrt[3 + x^2]*EllipticF[ArcSin[Sqrt[2]*x], -1/6])/(Sqrt[6]*Sqrt[3 - 5*x^2 - 2*x^4])

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Maple [B]  time = 0.056, size = 50, normalized size = 2.8 \begin{align*}{\frac{\sqrt{2}{\it EllipticF} \left ( x\sqrt{2},{\frac{i}{6}}\sqrt{6} \right ) }{6}\sqrt{-2\,{x}^{2}+1}\sqrt{3\,{x}^{2}+9}{\frac{1}{\sqrt{-2\,{x}^{4}-5\,{x}^{2}+3}}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(-2*x^4-5*x^2+3)^(1/2),x)

[Out]

1/6*2^(1/2)*(-2*x^2+1)^(1/2)*(3*x^2+9)^(1/2)/(-2*x^4-5*x^2+3)^(1/2)*EllipticF(x*2^(1/2),1/6*I*6^(1/2))

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Maxima [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{-2 \, x^{4} - 5 \, x^{2} + 3}}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(-2*x^4-5*x^2+3)^(1/2),x, algorithm="maxima")

[Out]

integrate(1/sqrt(-2*x^4 - 5*x^2 + 3), x)

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Fricas [F]  time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (-\frac{\sqrt{-2 \, x^{4} - 5 \, x^{2} + 3}}{2 \, x^{4} + 5 \, x^{2} - 3}, x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(-2*x^4-5*x^2+3)^(1/2),x, algorithm="fricas")

[Out]

integral(-sqrt(-2*x^4 - 5*x^2 + 3)/(2*x^4 + 5*x^2 - 3), x)

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Sympy [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{- 2 x^{4} - 5 x^{2} + 3}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(-2*x**4-5*x**2+3)**(1/2),x)

[Out]

Integral(1/sqrt(-2*x**4 - 5*x**2 + 3), x)

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{-2 \, x^{4} - 5 \, x^{2} + 3}}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(-2*x^4-5*x^2+3)^(1/2),x, algorithm="giac")

[Out]

integrate(1/sqrt(-2*x^4 - 5*x^2 + 3), x)