3.1.98 \(\int \frac {1}{\sqrt {-3+4 x^2-2 x^4}} \, dx\) [98]

Optimal. Leaf size=88 \[ \frac {\left (3+\sqrt {6} x^2\right ) \sqrt {\frac {3-4 x^2+2 x^4}{\left (3+\sqrt {6} x^2\right )^2}} F\left (2 \tan ^{-1}\left (\sqrt [4]{\frac {2}{3}} x\right )|\frac {1}{2}+\frac {1}{\sqrt {6}}\right )}{2 \sqrt [4]{6} \sqrt {-3+4 x^2-2 x^4}} \]

[Out]

1/12*(cos(2*arctan(1/3*2^(1/4)*3^(3/4)*x))^2)^(1/2)/cos(2*arctan(1/3*2^(1/4)*3^(3/4)*x))*EllipticF(sin(2*arcta
n(1/3*2^(1/4)*3^(3/4)*x)),1/6*(18+6*6^(1/2))^(1/2))*(3+x^2*6^(1/2))*((2*x^4-4*x^2+3)/(3+x^2*6^(1/2))^2)^(1/2)*
6^(3/4)/(-2*x^4+4*x^2-3)^(1/2)

________________________________________________________________________________________

Rubi [A]
time = 0.01, antiderivative size = 88, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.062, Rules used = {1117} \begin {gather*} \frac {\left (\sqrt {6} x^2+3\right ) \sqrt {\frac {2 x^4-4 x^2+3}{\left (\sqrt {6} x^2+3\right )^2}} F\left (2 \text {ArcTan}\left (\sqrt [4]{\frac {2}{3}} x\right )|\frac {1}{2}+\frac {1}{\sqrt {6}}\right )}{2 \sqrt [4]{6} \sqrt {-2 x^4+4 x^2-3}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/Sqrt[-3 + 4*x^2 - 2*x^4],x]

[Out]

((3 + Sqrt[6]*x^2)*Sqrt[(3 - 4*x^2 + 2*x^4)/(3 + Sqrt[6]*x^2)^2]*EllipticF[2*ArcTan[(2/3)^(1/4)*x], 1/2 + 1/Sq
rt[6]])/(2*6^(1/4)*Sqrt[-3 + 4*x^2 - 2*x^4])

Rule 1117

Int[1/Sqrt[(a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4], x_Symbol] :> With[{q = Rt[c/a, 4]}, Simp[(1 + q^2*x^2)*(Sqrt[(
a + b*x^2 + c*x^4)/(a*(1 + q^2*x^2)^2)]/(2*q*Sqrt[a + b*x^2 + c*x^4]))*EllipticF[2*ArcTan[q*x], 1/2 - b*(q^2/(
4*c))], x]] /; FreeQ[{a, b, c}, x] && NeQ[b^2 - 4*a*c, 0] && PosQ[c/a]

Rubi steps

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

________________________________________________________________________________________

Mathematica [C] Result contains complex when optimal does not.
time = 10.04, size = 144, normalized size = 1.64 \begin {gather*} -\frac {i \sqrt {1-\frac {2 x^2}{2-i \sqrt {2}}} \sqrt {1-\frac {2 x^2}{2+i \sqrt {2}}} F\left (i \sinh ^{-1}\left (\sqrt {-\frac {2}{2-i \sqrt {2}}} x\right )|\frac {2-i \sqrt {2}}{2+i \sqrt {2}}\right )}{\sqrt {2} \sqrt {-\frac {1}{2-i \sqrt {2}}} \sqrt {-3+4 x^2-2 x^4}} \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

((-I)*Sqrt[1 - (2*x^2)/(2 - I*Sqrt[2])]*Sqrt[1 - (2*x^2)/(2 + I*Sqrt[2])]*EllipticF[I*ArcSinh[Sqrt[-2/(2 - I*S
qrt[2])]*x], (2 - I*Sqrt[2])/(2 + I*Sqrt[2])])/(Sqrt[2]*Sqrt[-(2 - I*Sqrt[2])^(-1)]*Sqrt[-3 + 4*x^2 - 2*x^4])

________________________________________________________________________________________

Maple [C] Result contains complex when optimal does not.
time = 0.04, size = 87, normalized size = 0.99

method	result	size
default	\(\frac {3 \sqrt {1-\left (\frac {2}{3}-\frac {i \sqrt {2}}{3}\right ) x^{2}}\, \sqrt {1-\left (\frac {2}{3}+\frac {i \sqrt {2}}{3}\right ) x^{2}}\, \EllipticF \left (\frac {\sqrt {6-3 i \sqrt {2}}\, x}{3}, \frac {\sqrt {3+6 i \sqrt {2}}}{3}\right )}{\sqrt {6-3 i \sqrt {2}}\, \sqrt {-2 x^{4}+4 x^{2}-3}}\)	\(87\)
elliptic	\(\frac {3 \sqrt {1-\left (\frac {2}{3}-\frac {i \sqrt {2}}{3}\right ) x^{2}}\, \sqrt {1-\left (\frac {2}{3}+\frac {i \sqrt {2}}{3}\right ) x^{2}}\, \EllipticF \left (\frac {\sqrt {6-3 i \sqrt {2}}\, x}{3}, \frac {\sqrt {3+6 i \sqrt {2}}}{3}\right )}{\sqrt {6-3 i \sqrt {2}}\, \sqrt {-2 x^{4}+4 x^{2}-3}}\)	\(87\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(-2*x^4+4*x^2-3)^(1/2),x,method=_RETURNVERBOSE)

[Out]

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

________________________________________________________________________________________

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.

[In]

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

[Out]

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

________________________________________________________________________________________

Fricas [A]
time = 0.09, size = 46, normalized size = 0.52 \begin {gather*} \frac {1}{18} \, \sqrt {3} {\left (\sqrt {-2} \sqrt {-3} - 2 \, \sqrt {-3}\right )} \sqrt {\sqrt {-2} + 2} {\rm ellipticF}\left (\frac {1}{3} \, \sqrt {3} x \sqrt {\sqrt {-2} + 2}, -\frac {2}{3} \, \sqrt {-2} + \frac {1}{3}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/18*sqrt(3)*(sqrt(-2)*sqrt(-3) - 2*sqrt(-3))*sqrt(sqrt(-2) + 2)*ellipticF(1/3*sqrt(3)*x*sqrt(sqrt(-2) + 2), -
2/3*sqrt(-2) + 1/3)

________________________________________________________________________________________

Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{\sqrt {- 2 x^{4} + 4 x^{2} - 3}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

________________________________________________________________________________________

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.

[In]

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

[Out]

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

________________________________________________________________________________________

Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int \frac {1}{\sqrt {-2\,x^4+4\,x^2-3}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(4*x^2 - 2*x^4 - 3)^(1/2),x)

[Out]

int(1/(4*x^2 - 2*x^4 - 3)^(1/2), x)

________________________________________________________________________________________