3.33 \(\int \frac {1+2 x}{(3+x+x^2) \sqrt {5+x+x^2}} \, dx\)

Optimal. Leaf size=24 \[ -\sqrt {2} \tanh ^{-1}\left (\frac {\sqrt {x^2+x+5}}{\sqrt {2}}\right ) \]

[Out]

-arctanh(1/2*(x^2+x+5)^(1/2)*2^(1/2))*2^(1/2)

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Rubi [A]  time = 0.02, antiderivative size = 24, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 24, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.083, Rules used = {1024, 206} \[ -\sqrt {2} \tanh ^{-1}\left (\frac {\sqrt {x^2+x+5}}{\sqrt {2}}\right ) \]

Antiderivative was successfully verified.

[In]

Int[(1 + 2*x)/((3 + x + x^2)*Sqrt[5 + x + x^2]),x]

[Out]

-(Sqrt[2]*ArcTanh[Sqrt[5 + x + x^2]/Sqrt[2]])

Rule 206

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

Rule 1024

Int[((g_) + (h_.)*(x_))/(((a_) + (b_.)*(x_) + (c_.)*(x_)^2)*Sqrt[(d_.) + (e_.)*(x_) + (f_.)*(x_)^2]), x_Symbol
] :> Dist[-2*g, Subst[Int[1/(b*d - a*e - b*x^2), x], x, Sqrt[d + e*x + f*x^2]], x] /; FreeQ[{a, b, c, d, e, f,
g, h}, x] && NeQ[b^2 - 4*a*c, 0] && NeQ[e^2 - 4*d*f, 0] && EqQ[c*e - b*f, 0] && EqQ[h*e - 2*g*f, 0]

Rubi steps

\begin {align*} \int \frac {1+2 x}{\left (3+x+x^2\right ) \sqrt {5+x+x^2}} \, dx &=-\left (2 \operatorname {Subst}\left (\int \frac {1}{2-x^2} \, dx,x,\sqrt {5+x+x^2}\right )\right )\\ &=-\sqrt {2} \tanh ^{-1}\left (\frac {\sqrt {5+x+x^2}}{\sqrt {2}}\right )\\ \end {align*}

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Mathematica [C]  time = 0.06, size = 90, normalized size = 3.75 \[ -\frac {\tanh ^{-1}\left (\frac {-2 i \sqrt {11} x-i \sqrt {11}+19}{4 \sqrt {2} \sqrt {x^2+x+5}}\right )+\tanh ^{-1}\left (\frac {2 i \sqrt {11} x+i \sqrt {11}+19}{4 \sqrt {2} \sqrt {x^2+x+5}}\right )}{\sqrt {2}} \]

Antiderivative was successfully verified.

[In]

Integrate[(1 + 2*x)/((3 + x + x^2)*Sqrt[5 + x + x^2]),x]

[Out]

-((ArcTanh[(19 - I*Sqrt[11] - (2*I)*Sqrt[11]*x)/(4*Sqrt[2]*Sqrt[5 + x + x^2])] + ArcTanh[(19 + I*Sqrt[11] + (2
*I)*Sqrt[11]*x)/(4*Sqrt[2]*Sqrt[5 + x + x^2])])/Sqrt[2])

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fricas [A]  time = 1.10, size = 34, normalized size = 1.42 \[ \frac {1}{2} \, \sqrt {2} \log \left (\frac {x^{2} - 2 \, \sqrt {2} \sqrt {x^{2} + x + 5} + x + 7}{x^{2} + x + 3}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*sqrt(2)*log((x^2 - 2*sqrt(2)*sqrt(x^2 + x + 5) + x + 7)/(x^2 + x + 3))

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giac [B]  time = 0.36, size = 39, normalized size = 1.62 \[ -\frac {1}{2} \, \sqrt {2} \log \left (\sqrt {2} + \sqrt {x^{2} + x + 5}\right ) + \frac {1}{2} \, \sqrt {2} \log \left (-\sqrt {2} + \sqrt {x^{2} + x + 5}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-1/2*sqrt(2)*log(sqrt(2) + sqrt(x^2 + x + 5)) + 1/2*sqrt(2)*log(-sqrt(2) + sqrt(x^2 + x + 5))

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maple [A]  time = 0.02, size = 20, normalized size = 0.83 \[ -\sqrt {2}\, \arctanh \left (\frac {\sqrt {x^{2}+x +5}\, \sqrt {2}}{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-arctanh(1/2*(x^2+x+5)^(1/2)*2^(1/2))*2^(1/2)

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maxima [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {2 \, x + 1}{\sqrt {x^{2} + x + 5} {\left (x^{2} + x + 3\right )}}\,{d x} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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mupad [B]  time = 3.78, size = 19, normalized size = 0.79 \[ -\sqrt {2}\,\mathrm {atanh}\left (\frac {\sqrt {2}\,\sqrt {x^2+x+5}}{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-2^(1/2)*atanh((2^(1/2)*(x + x^2 + 5)^(1/2))/2)

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sympy [A]  time = 6.81, size = 68, normalized size = 2.83 \[ 2 \left (\begin {cases} - \frac {\sqrt {2} \operatorname {acoth}{\left (\frac {\sqrt {2}}{\sqrt {x^{2} + x + 5}} \right )}}{2} & \text {for}\: \frac {1}{x^{2} + x + 5} > \frac {1}{2} \\- \frac {\sqrt {2} \operatorname {atanh}{\left (\frac {\sqrt {2}}{\sqrt {x^{2} + x + 5}} \right )}}{2} & \text {for}\: \frac {1}{x^{2} + x + 5} < \frac {1}{2} \end {cases}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

2*Piecewise((-sqrt(2)*acoth(sqrt(2)/sqrt(x**2 + x + 5))/2, 1/(x**2 + x + 5) > 1/2), (-sqrt(2)*atanh(sqrt(2)/sq
rt(x**2 + x + 5))/2, 1/(x**2 + x + 5) < 1/2))

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