3.2.21 \(\int \frac {1}{\sqrt {-2+4 x+3 x^2}} \, dx\) [121]

Optimal. Leaf size=32 \[ \frac {\tanh ^{-1}\left (\frac {2+3 x}{\sqrt {3} \sqrt {-2+4 x+3 x^2}}\right )}{\sqrt {3}} \]

[Out]

1/3*arctanh(1/3*(2+3*x)*3^(1/2)/(3*x^2+4*x-2)^(1/2))*3^(1/2)

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Rubi [A]
time = 0.01, antiderivative size = 32, normalized size of antiderivative = 1.00, 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 = {635, 212} \begin {gather*} \frac {\tanh ^{-1}\left (\frac {3 x+2}{\sqrt {3} \sqrt {3 x^2+4 x-2}}\right )}{\sqrt {3}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/Sqrt[-2 + 4*x + 3*x^2],x]

[Out]

ArcTanh[(2 + 3*x)/(Sqrt[3]*Sqrt[-2 + 4*x + 3*x^2])]/Sqrt[3]

Rule 212

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1/(Rt[a, 2]*Rt[-b, 2]))*ArcTanh[Rt[-b, 2]*(x/Rt[a, 2])], x]
/; FreeQ[{a, b}, x] && NegQ[a/b] && (GtQ[a, 0] || LtQ[b, 0])

Rule 635

Int[1/Sqrt[(a_) + (b_.)*(x_) + (c_.)*(x_)^2], x_Symbol] :> Dist[2, Subst[Int[1/(4*c - x^2), x], x, (b + 2*c*x)
/Sqrt[a + b*x + c*x^2]], x] /; FreeQ[{a, b, c}, x] && NeQ[b^2 - 4*a*c, 0]

Rubi steps

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

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Mathematica [A]
time = 0.06, size = 27, normalized size = 0.84 \begin {gather*} -\frac {\log \left (-2-3 x+\sqrt {-6+12 x+9 x^2}\right )}{\sqrt {3}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/Sqrt[-2 + 4*x + 3*x^2],x]

[Out]

-(Log[-2 - 3*x + Sqrt[-6 + 12*x + 9*x^2]]/Sqrt[3])

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Maple [A]
time = 0.51, size = 30, normalized size = 0.94

method	result	size
default	\(\frac {\ln \left (\frac {\left (2+3 x \right ) \sqrt {3}}{3}+\sqrt {3 x^{2}+4 x -2}\right ) \sqrt {3}}{3}\)	\(30\)
trager	\(\frac {\RootOf \left (\textit {\_Z}^{2}-3\right ) \ln \left (3 \RootOf \left (\textit {\_Z}^{2}-3\right ) x +3 \sqrt {3 x^{2}+4 x -2}+2 \RootOf \left (\textit {\_Z}^{2}-3\right )\right )}{3}\)	\(42\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/3*ln(1/3*(2+3*x)*3^(1/2)+(3*x^2+4*x-2)^(1/2))*3^(1/2)

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Maxima [A]
time = 0.51, size = 28, normalized size = 0.88 \begin {gather*} \frac {1}{3} \, \sqrt {3} \log \left (2 \, \sqrt {3} \sqrt {3 \, x^{2} + 4 \, x - 2} + 6 \, x + 4\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/3*sqrt(3)*log(2*sqrt(3)*sqrt(3*x^2 + 4*x - 2) + 6*x + 4)

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Fricas [A]
time = 1.84, size = 37, normalized size = 1.16 \begin {gather*} \frac {1}{6} \, \sqrt {3} \log \left (\sqrt {3} \sqrt {3 \, x^{2} + 4 \, x - 2} {\left (3 \, x + 2\right )} + 9 \, x^{2} + 12 \, x - 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/6*sqrt(3)*log(sqrt(3)*sqrt(3*x^2 + 4*x - 2)*(3*x + 2) + 9*x^2 + 12*x - 1)

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(1/sqrt(3*x**2 + 4*x - 2), x)

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Giac [A]
time = 0.68, size = 54, normalized size = 1.69 \begin {gather*} \frac {1}{6} \, \sqrt {3 \, x^{2} + 4 \, x - 2} {\left (3 \, x + 2\right )} + \frac {5}{9} \, \sqrt {3} \log \left ({\left | -\sqrt {3} {\left (\sqrt {3} x - \sqrt {3 \, x^{2} + 4 \, x - 2}\right )} - 2 \right |}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/6*sqrt(3*x^2 + 4*x - 2)*(3*x + 2) + 5/9*sqrt(3)*log(abs(-sqrt(3)*(sqrt(3)*x - sqrt(3*x^2 + 4*x - 2)) - 2))

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Mupad [B]
time = 0.23, size = 26, normalized size = 0.81 \begin {gather*} \frac {\sqrt {3}\,\ln \left (\sqrt {3}\,\left (x+\frac {2}{3}\right )+\sqrt {3\,x^2+4\,x-2}\right )}{3} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(4*x + 3*x^2 - 2)^(1/2),x)

[Out]

(3^(1/2)*log(3^(1/2)*(x + 2/3) + (4*x + 3*x^2 - 2)^(1/2)))/3

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