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

Optimal. Leaf size=109 \[ \frac {\sqrt [3]{1-x^3} \log \left (\sqrt [3]{1-x^3}+x\right )}{2 \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}}-\frac {\sqrt [3]{1-x^3} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{1-x^3}}}{\sqrt {3}}\right )}{\sqrt {3} \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}} \]

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Rubi [A]  time = 0.02, antiderivative size = 109, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 20, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.100, Rules used = {713, 239} \begin {gather*} \frac {\sqrt [3]{1-x^3} \log \left (\sqrt [3]{1-x^3}+x\right )}{2 \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}}-\frac {\sqrt [3]{1-x^3} \tan ^{-1}\left (\frac {1-\frac {2 x}{\sqrt [3]{1-x^3}}}{\sqrt {3}}\right )}{\sqrt {3} \sqrt [3]{1-x} \sqrt [3]{x^2+x+1}} \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

-(((1 - x^3)^(1/3)*ArcTan[(1 - (2*x)/(1 - x^3)^(1/3))/Sqrt[3]])/(Sqrt[3]*(1 - x)^(1/3)*(1 + x + x^2)^(1/3))) +
((1 - x^3)^(1/3)*Log[x + (1 - x^3)^(1/3)])/(2*(1 - x)^(1/3)*(1 + x + x^2)^(1/3))

Rule 239

Int[((a_) + (b_.)*(x_)^3)^(-1/3), x_Symbol] :> Simp[ArcTan[(1 + (2*Rt[b, 3]*x)/(a + b*x^3)^(1/3))/Sqrt[3]]/(Sq
rt[3]*Rt[b, 3]), x] - Simp[Log[(a + b*x^3)^(1/3) - Rt[b, 3]*x]/(2*Rt[b, 3]), x] /; FreeQ[{a, b}, x]

Rule 713

Int[((d_.) + (e_.)*(x_))^(m_)*((a_) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_), x_Symbol] :> Dist[((d + e*x)^FracPart[p
]*(a + b*x + c*x^2)^FracPart[p])/(a*d + c*e*x^3)^FracPart[p], Int[(d + e*x)^(m - p)*(a*d + c*e*x^3)^p, x], x]
/; FreeQ[{a, b, c, d, e, m, p}, x] && EqQ[b*d + a*e, 0] && EqQ[c*d + b*e, 0] && IGtQ[m - p + 1, 0] &&  !Intege
rQ[p]

Rubi steps

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

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Mathematica [C]  time = 0.06, size = 132, normalized size = 1.21 \begin {gather*} -\frac {3 (1-x)^{2/3} \sqrt [3]{\frac {-2 i x+\sqrt {3}-i}{\sqrt {3}-3 i}} \sqrt [3]{\frac {2 i x+\sqrt {3}+i}{\sqrt {3}+3 i}} F_1\left (\frac {2}{3};\frac {1}{3},\frac {1}{3};\frac {5}{3};-\frac {2 i (x-1)}{3 i+\sqrt {3}},\frac {2 i (x-1)}{-3 i+\sqrt {3}}\right )}{2 \sqrt [3]{x^2+x+1}} \end {gather*}

Warning: Unable to verify antiderivative.

[In]

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

[Out]

(-3*(1 - x)^(2/3)*((-I + Sqrt[3] - (2*I)*x)/(-3*I + Sqrt[3]))^(1/3)*((I + Sqrt[3] + (2*I)*x)/(3*I + Sqrt[3]))^
(1/3)*AppellF1[2/3, 1/3, 1/3, 5/3, ((-2*I)*(-1 + x))/(3*I + Sqrt[3]), ((2*I)*(-1 + x))/(-3*I + Sqrt[3])])/(2*(
1 + x + x^2)^(1/3))

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IntegrateAlgebraic [F]  time = 13.12, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{\sqrt [3]{1-x} \sqrt [3]{1+x+x^2}} \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[1/((1 - x)^(1/3)*(1 + x + x^2)^(1/3)),x]

[Out]

Defer[IntegrateAlgebraic][1/((1 - x)^(1/3)*(1 + x + x^2)^(1/3)), x]

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fricas [A]  time = 0.60, size = 115, normalized size = 1.06 \begin {gather*} -\frac {1}{3} \, \sqrt {3} \arctan \left (\frac {4 \, \sqrt {3} {\left (x^{2} + x + 1\right )}^{\frac {1}{3}} x^{2} {\left (-x + 1\right )}^{\frac {1}{3}} + 2 \, \sqrt {3} {\left (x^{2} + x + 1\right )}^{\frac {2}{3}} x {\left (-x + 1\right )}^{\frac {2}{3}} - \sqrt {3} {\left (x^{3} - 1\right )}}{9 \, x^{3} - 1}\right ) + \frac {1}{6} \, \log \left (3 \, {\left (x^{2} + x + 1\right )}^{\frac {1}{3}} x^{2} {\left (-x + 1\right )}^{\frac {1}{3}} + 3 \, {\left (x^{2} + x + 1\right )}^{\frac {2}{3}} x {\left (-x + 1\right )}^{\frac {2}{3}} + 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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giac [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{{\left (x^{2} + x + 1\right )}^{\frac {1}{3}} {\left (-x + 1\right )}^{\frac {1}{3}}}\,{d x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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maple [F]  time = 2.88, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{\left (-x +1\right )^{\frac {1}{3}} \left (x^{2}+x +1\right )^{\frac {1}{3}}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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maxima [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{{\left (x^{2} + x + 1\right )}^{\frac {1}{3}} {\left (-x + 1\right )}^{\frac {1}{3}}}\,{d x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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mupad [F]  time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int \frac {1}{{\left (1-x\right )}^{1/3}\,{\left (x^2+x+1\right )}^{1/3}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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