3.129 \(\int e^{\frac {2}{3} \tanh ^{-1}(x)} x \, dx\)

Optimal. Leaf size=112 \[ -\frac {1}{2} (1-x)^{2/3} (x+1)^{4/3}-\frac {1}{3} (1-x)^{2/3} \sqrt [3]{x+1}+\frac {1}{9} \log (x+1)+\frac {1}{3} \log \left (\frac {\sqrt [3]{1-x}}{\sqrt [3]{x+1}}+1\right )+\frac {2 \tan ^{-1}\left (\frac {1}{\sqrt {3}}-\frac {2 \sqrt [3]{1-x}}{\sqrt {3} \sqrt [3]{x+1}}\right )}{3 \sqrt {3}} \]

[Out]

-1/3*(1-x)^(2/3)*(1+x)^(1/3)-1/2*(1-x)^(2/3)*(1+x)^(4/3)+1/9*ln(1+x)+1/3*ln(1+(1-x)^(1/3)/(1+x)^(1/3))-2/9*arc
tan(-1/3*3^(1/2)+2/3*(1-x)^(1/3)/(1+x)^(1/3)*3^(1/2))*3^(1/2)

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Rubi [A]  time = 0.03, antiderivative size = 112, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.400, Rules used = {6126, 80, 50, 60} \[ -\frac {1}{2} (1-x)^{2/3} (x+1)^{4/3}-\frac {1}{3} (1-x)^{2/3} \sqrt [3]{x+1}+\frac {1}{9} \log (x+1)+\frac {1}{3} \log \left (\frac {\sqrt [3]{1-x}}{\sqrt [3]{x+1}}+1\right )+\frac {2 \tan ^{-1}\left (\frac {1}{\sqrt {3}}-\frac {2 \sqrt [3]{1-x}}{\sqrt {3} \sqrt [3]{x+1}}\right )}{3 \sqrt {3}} \]

Antiderivative was successfully verified.

[In]

Int[E^((2*ArcTanh[x])/3)*x,x]

[Out]

-((1 - x)^(2/3)*(1 + x)^(1/3))/3 - ((1 - x)^(2/3)*(1 + x)^(4/3))/2 + (2*ArcTan[1/Sqrt[3] - (2*(1 - x)^(1/3))/(
Sqrt[3]*(1 + x)^(1/3))])/(3*Sqrt[3]) + Log[1 + x]/9 + Log[1 + (1 - x)^(1/3)/(1 + x)^(1/3)]/3

Rule 50

Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[((a + b*x)^(m + 1)*(c + d*x)^n)/(b*
(m + n + 1)), x] + Dist[(n*(b*c - a*d))/(b*(m + n + 1)), Int[(a + b*x)^m*(c + d*x)^(n - 1), x], x] /; FreeQ[{a
, b, c, d}, x] && NeQ[b*c - a*d, 0] && GtQ[n, 0] && NeQ[m + n + 1, 0] &&  !(IGtQ[m, 0] && ( !IntegerQ[n] || (G
tQ[m, 0] && LtQ[m - n, 0]))) &&  !ILtQ[m + n + 2, 0] && IntLinearQ[a, b, c, d, m, n, x]

Rule 60

Int[1/(((a_.) + (b_.)*(x_))^(1/3)*((c_.) + (d_.)*(x_))^(2/3)), x_Symbol] :> With[{q = Rt[-(d/b), 3]}, Simp[(Sq
rt[3]*q*ArcTan[1/Sqrt[3] - (2*q*(a + b*x)^(1/3))/(Sqrt[3]*(c + d*x)^(1/3))])/d, x] + (Simp[(3*q*Log[(q*(a + b*
x)^(1/3))/(c + d*x)^(1/3) + 1])/(2*d), x] + Simp[(q*Log[c + d*x])/(2*d), x])] /; FreeQ[{a, b, c, d}, x] && NeQ
[b*c - a*d, 0] && NegQ[d/b]

Rule 80

Int[((a_.) + (b_.)*(x_))*((c_.) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_.), x_Symbol] :> Simp[(b*(c + d*x)
^(n + 1)*(e + f*x)^(p + 1))/(d*f*(n + p + 2)), x] + Dist[(a*d*f*(n + p + 2) - b*(d*e*(n + 1) + c*f*(p + 1)))/(
d*f*(n + p + 2)), Int[(c + d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, c, d, e, f, n, p}, x] && NeQ[n + p + 2,
0]

Rule 6126

Int[E^(ArcTanh[(a_.)*(x_)]*(n_))*(x_)^(m_.), x_Symbol] :> Int[(x^m*(1 + a*x)^(n/2))/(1 - a*x)^(n/2), x] /; Fre
eQ[{a, m, n}, x] &&  !IntegerQ[(n - 1)/2]

Rubi steps

\begin {align*} \int e^{\frac {2}{3} \tanh ^{-1}(x)} x \, dx &=\int \frac {x \sqrt [3]{1+x}}{\sqrt [3]{1-x}} \, dx\\ &=-\frac {1}{2} (1-x)^{2/3} (1+x)^{4/3}+\frac {1}{3} \int \frac {\sqrt [3]{1+x}}{\sqrt [3]{1-x}} \, dx\\ &=-\frac {1}{3} (1-x)^{2/3} \sqrt [3]{1+x}-\frac {1}{2} (1-x)^{2/3} (1+x)^{4/3}+\frac {2}{9} \int \frac {1}{\sqrt [3]{1-x} (1+x)^{2/3}} \, dx\\ &=-\frac {1}{3} (1-x)^{2/3} \sqrt [3]{1+x}-\frac {1}{2} (1-x)^{2/3} (1+x)^{4/3}+\frac {2 \tan ^{-1}\left (\frac {1}{\sqrt {3}}-\frac {2 \sqrt [3]{1-x}}{\sqrt {3} \sqrt [3]{1+x}}\right )}{3 \sqrt {3}}+\frac {1}{9} \log (1+x)+\frac {1}{3} \log \left (1+\frac {\sqrt [3]{1-x}}{\sqrt [3]{1+x}}\right )\\ \end {align*}

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Mathematica [C]  time = 0.01, size = 46, normalized size = 0.41 \[ -\frac {1}{2} (1-x)^{2/3} \left (\sqrt [3]{2} \, _2F_1\left (-\frac {1}{3},\frac {2}{3};\frac {5}{3};\frac {1-x}{2}\right )+(x+1)^{4/3}\right ) \]

Warning: Unable to verify antiderivative.

[In]

Integrate[E^((2*ArcTanh[x])/3)*x,x]

[Out]

-1/2*((1 - x)^(2/3)*((1 + x)^(4/3) + 2^(1/3)*Hypergeometric2F1[-1/3, 2/3, 5/3, (1 - x)/2]))

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fricas [A]  time = 0.61, size = 154, normalized size = 1.38 \[ \frac {1}{6} \, {\left (3 \, x^{2} + 2 \, x - 5\right )} \left (-\frac {\sqrt {-x^{2} + 1}}{x - 1}\right )^{\frac {2}{3}} + \frac {2}{9} \, \sqrt {3} \arctan \left (\frac {2}{3} \, \sqrt {3} \left (-\frac {\sqrt {-x^{2} + 1}}{x - 1}\right )^{\frac {2}{3}} - \frac {1}{3} \, \sqrt {3}\right ) + \frac {2}{9} \, \log \left (\left (-\frac {\sqrt {-x^{2} + 1}}{x - 1}\right )^{\frac {2}{3}} + 1\right ) - \frac {1}{9} \, \log \left (-\frac {{\left (x - 1\right )} \left (-\frac {\sqrt {-x^{2} + 1}}{x - 1}\right )^{\frac {2}{3}} - x + \sqrt {-x^{2} + 1} \left (-\frac {\sqrt {-x^{2} + 1}}{x - 1}\right )^{\frac {1}{3}} + 1}{x - 1}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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maple [F]  time = 0.03, size = 0, normalized size = 0.00 \[ \int \left (\frac {1+x}{\sqrt {-x^{2}+1}}\right )^{\frac {2}{3}} x\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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