3.4.2 \(\int \frac {(1+x^7)^{2/3}}{x^8} \, dx\) [302]

Optimal. Leaf size=70 \[ -\frac {\left (1+x^7\right )^{2/3}}{7 x^7}+\frac {2 \tan ^{-1}\left (\frac {1+2 \sqrt [3]{1+x^7}}{\sqrt {3}}\right )}{7 \sqrt {3}}-\frac {\log (x)}{3}+\frac {1}{7} \log \left (1-\sqrt [3]{1+x^7}\right ) \]

[Out]

-1/7*(x^7+1)^(2/3)/x^7-1/3*ln(x)+1/7*ln(1-(x^7+1)^(1/3))+2/21*arctan(1/3*(1+2*(x^7+1)^(1/3))*3^(1/2))*3^(1/2)

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Rubi [A]
time = 0.03, antiderivative size = 70, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 6, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.462, Rules used = {272, 43, 57, 632, 210, 31} \begin {gather*} \frac {2 \text {ArcTan}\left (\frac {2 \sqrt [3]{x^7+1}+1}{\sqrt {3}}\right )}{7 \sqrt {3}}-\frac {\left (x^7+1\right )^{2/3}}{7 x^7}+\frac {1}{7} \log \left (1-\sqrt [3]{x^7+1}\right )-\frac {\log (x)}{3} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(1 + x^7)^(2/3)/x^8,x]

[Out]

-1/7*(1 + x^7)^(2/3)/x^7 + (2*ArcTan[(1 + 2*(1 + x^7)^(1/3))/Sqrt[3]])/(7*Sqrt[3]) - Log[x]/3 + Log[1 - (1 + x
^7)^(1/3)]/7

Rule 31

Int[((a_) + (b_.)*(x_))^(-1), x_Symbol] :> Simp[Log[RemoveContent[a + b*x, x]]/b, x] /; FreeQ[{a, b}, x]

Rule 43

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

Rule 57

Int[1/(((a_.) + (b_.)*(x_))*((c_.) + (d_.)*(x_))^(1/3)), x_Symbol] :> With[{q = Rt[(b*c - a*d)/b, 3]}, Simp[-L
og[RemoveContent[a + b*x, x]]/(2*b*q), x] + (Dist[3/(2*b), Subst[Int[1/(q^2 + q*x + x^2), x], x, (c + d*x)^(1/
3)], x] - Dist[3/(2*b*q), Subst[Int[1/(q - x), x], x, (c + d*x)^(1/3)], x])] /; FreeQ[{a, b, c, d}, x] && PosQ
[(b*c - a*d)/b]

Rule 210

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

Rule 272

Int[(x_)^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Dist[1/n, Subst[Int[x^(Simplify[(m + 1)/n] - 1)*(a
+ b*x)^p, x], x, x^n], x] /; FreeQ[{a, b, m, n, p}, x] && IntegerQ[Simplify[(m + 1)/n]]

Rule 632

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

Rubi steps

\begin {align*} \int \frac {\left (1+x^7\right )^{2/3}}{x^8} \, dx &=\frac {1}{7} \text {Subst}\left (\int \frac {(1+x)^{2/3}}{x^2} \, dx,x,x^7\right )\\ &=-\frac {\left (1+x^7\right )^{2/3}}{7 x^7}+\frac {2}{21} \text {Subst}\left (\int \frac {1}{x \sqrt [3]{1+x}} \, dx,x,x^7\right )\\ &=-\frac {\left (1+x^7\right )^{2/3}}{7 x^7}-\frac {\log (x)}{3}-\frac {1}{7} \text {Subst}\left (\int \frac {1}{1-x} \, dx,x,\sqrt [3]{1+x^7}\right )+\frac {1}{7} \text {Subst}\left (\int \frac {1}{1+x+x^2} \, dx,x,\sqrt [3]{1+x^7}\right )\\ &=-\frac {\left (1+x^7\right )^{2/3}}{7 x^7}-\frac {\log (x)}{3}+\frac {1}{7} \log \left (1-\sqrt [3]{1+x^7}\right )-\frac {2}{7} \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1+2 \sqrt [3]{1+x^7}\right )\\ &=-\frac {\left (1+x^7\right )^{2/3}}{7 x^7}+\frac {2 \tan ^{-1}\left (\frac {1+2 \sqrt [3]{1+x^7}}{\sqrt {3}}\right )}{7 \sqrt {3}}-\frac {\log (x)}{3}+\frac {1}{7} \log \left (1-\sqrt [3]{1+x^7}\right )\\ \end {align*}

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Mathematica [A]
time = 0.09, size = 83, normalized size = 1.19 \begin {gather*} \frac {1}{21} \left (-\frac {3 \left (1+x^7\right )^{2/3}}{x^7}+2 \sqrt {3} \tan ^{-1}\left (\frac {1+2 \sqrt [3]{1+x^7}}{\sqrt {3}}\right )+2 \log \left (-1+\sqrt [3]{1+x^7}\right )-\log \left (1+\sqrt [3]{1+x^7}+\left (1+x^7\right )^{2/3}\right )\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(1 + x^7)^(2/3)/x^8,x]

[Out]

((-3*(1 + x^7)^(2/3))/x^7 + 2*Sqrt[3]*ArcTan[(1 + 2*(1 + x^7)^(1/3))/Sqrt[3]] + 2*Log[-1 + (1 + x^7)^(1/3)] -
Log[1 + (1 + x^7)^(1/3) + (1 + x^7)^(2/3)])/21

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Maple [C] Result contains higher order function than in optimal. Order 5 vs. order 3.
time = 6.23, size = 76, normalized size = 1.09

method	result	size
meijerg	\(-\frac {\sqrt {3}\, \Gamma \left (\frac {2}{3}\right ) \left (\frac {\pi \sqrt {3}}{\Gamma \left (\frac {2}{3}\right ) x^{7}}-\frac {2 \left (-\frac {\pi \sqrt {3}}{6}-\frac {3 \ln \left (3\right )}{2}-1+7 \ln \left (x \right )\right ) \pi \sqrt {3}}{3 \Gamma \left (\frac {2}{3}\right )}+\frac {\pi \sqrt {3}\, x^{7} \hypergeom \left (\left [1, 1, \frac {4}{3}\right ], \left [2, 3\right ], -x^{7}\right )}{9 \Gamma \left (\frac {2}{3}\right )}\right )}{21 \pi }\)	\(76\)
risch	\(-\frac {\left (x^{7}+1\right )^{\frac {2}{3}}}{7 x^{7}}+\frac {\sqrt {3}\, \Gamma \left (\frac {2}{3}\right ) \left (\frac {2 \left (-\frac {\pi \sqrt {3}}{6}-\frac {3 \ln \left (3\right )}{2}+7 \ln \left (x \right )\right ) \pi \sqrt {3}}{3 \Gamma \left (\frac {2}{3}\right )}-\frac {2 \pi \sqrt {3}\, x^{7} \hypergeom \left (\left [1, 1, \frac {4}{3}\right ], \left [2, 2\right ], -x^{7}\right )}{9 \Gamma \left (\frac {2}{3}\right )}\right )}{21 \pi }\)	\(76\)
trager	\(-\frac {\left (x^{7}+1\right )^{\frac {2}{3}}}{7 x^{7}}+\frac {2 \ln \left (-\frac {3914010 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )^{2} x^{7}-2502441 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right ) x^{7}-71266 x^{7}+6095754 \left (x^{7}+1\right )^{\frac {2}{3}} \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )-3914010 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )^{2}-770175 \left (x^{7}+1\right )^{\frac {1}{3}} \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )+1775193 \left (x^{7}+1\right )^{\frac {2}{3}}-6630249 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )-2031918 \left (x^{7}+1\right )^{\frac {1}{3}}-178165}{x^{7}}\right )}{21}+\frac {2 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right ) \ln \left (\frac {320697 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )^{2} x^{7}+1625367 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right ) x^{7}+1304670 x^{7}+6095754 \left (x^{7}+1\right )^{\frac {2}{3}} \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )-320697 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )^{2}-5325579 \left (x^{7}+1\right )^{\frac {1}{3}} \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )+256725 \left (x^{7}+1\right )^{\frac {2}{3}}-877074 \RootOf \left (9 \textit {\_Z}^{2}+3 \textit {\_Z} +1\right )-2031918 \left (x^{7}+1\right )^{\frac {1}{3}}+1739560}{x^{7}}\right )}{7}\)	\(294\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x^7+1)^(2/3)/x^8,x,method=_RETURNVERBOSE)

[Out]

-1/21/Pi*3^(1/2)*GAMMA(2/3)*(Pi*3^(1/2)/GAMMA(2/3)/x^7-2/3*(-1/6*Pi*3^(1/2)-3/2*ln(3)-1+7*ln(x))*Pi*3^(1/2)/GA
MMA(2/3)+1/9*Pi*3^(1/2)/GAMMA(2/3)*x^7*hypergeom([1,1,4/3],[2,3],-x^7))

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Maxima [A]
time = 4.04, size = 66, normalized size = 0.94 \begin {gather*} \frac {2}{21} \, \sqrt {3} \arctan \left (\frac {1}{3} \, \sqrt {3} {\left (2 \, {\left (x^{7} + 1\right )}^{\frac {1}{3}} + 1\right )}\right ) - \frac {{\left (x^{7} + 1\right )}^{\frac {2}{3}}}{7 \, x^{7}} - \frac {1}{21} \, \log \left ({\left (x^{7} + 1\right )}^{\frac {2}{3}} + {\left (x^{7} + 1\right )}^{\frac {1}{3}} + 1\right ) + \frac {2}{21} \, \log \left ({\left (x^{7} + 1\right )}^{\frac {1}{3}} - 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^7+1)^(2/3)/x^8,x, algorithm="maxima")

[Out]

2/21*sqrt(3)*arctan(1/3*sqrt(3)*(2*(x^7 + 1)^(1/3) + 1)) - 1/7*(x^7 + 1)^(2/3)/x^7 - 1/21*log((x^7 + 1)^(2/3)
+ (x^7 + 1)^(1/3) + 1) + 2/21*log((x^7 + 1)^(1/3) - 1)

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Fricas [A]
time = 1.00, size = 79, normalized size = 1.13 \begin {gather*} \frac {2 \, \sqrt {3} x^{7} \arctan \left (\frac {2}{3} \, \sqrt {3} {\left (x^{7} + 1\right )}^{\frac {1}{3}} + \frac {1}{3} \, \sqrt {3}\right ) - x^{7} \log \left ({\left (x^{7} + 1\right )}^{\frac {2}{3}} + {\left (x^{7} + 1\right )}^{\frac {1}{3}} + 1\right ) + 2 \, x^{7} \log \left ({\left (x^{7} + 1\right )}^{\frac {1}{3}} - 1\right ) - 3 \, {\left (x^{7} + 1\right )}^{\frac {2}{3}}}{21 \, x^{7}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^7+1)^(2/3)/x^8,x, algorithm="fricas")

[Out]

1/21*(2*sqrt(3)*x^7*arctan(2/3*sqrt(3)*(x^7 + 1)^(1/3) + 1/3*sqrt(3)) - x^7*log((x^7 + 1)^(2/3) + (x^7 + 1)^(1
/3) + 1) + 2*x^7*log((x^7 + 1)^(1/3) - 1) - 3*(x^7 + 1)^(2/3))/x^7

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Sympy [C] Result contains complex when optimal does not.
time = 0.69, size = 34, normalized size = 0.49 \begin {gather*} - \frac {\Gamma \left (\frac {1}{3}\right ) {{}_{2}F_{1}\left (\begin {matrix} - \frac {2}{3}, \frac {1}{3} \\ \frac {4}{3} \end {matrix}\middle | {\frac {e^{i \pi }}{x^{7}}} \right )}}{7 x^{\frac {7}{3}} \Gamma \left (\frac {4}{3}\right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x**7+1)**(2/3)/x**8,x)

[Out]

-gamma(1/3)*hyper((-2/3, 1/3), (4/3,), exp_polar(I*pi)/x**7)/(7*x**(7/3)*gamma(4/3))

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Giac [A]
time = 0.65, size = 67, normalized size = 0.96 \begin {gather*} \frac {2}{21} \, \sqrt {3} \arctan \left (\frac {1}{3} \, \sqrt {3} {\left (2 \, {\left (x^{7} + 1\right )}^{\frac {1}{3}} + 1\right )}\right ) - \frac {{\left (x^{7} + 1\right )}^{\frac {2}{3}}}{7 \, x^{7}} - \frac {1}{21} \, \log \left ({\left (x^{7} + 1\right )}^{\frac {2}{3}} + {\left (x^{7} + 1\right )}^{\frac {1}{3}} + 1\right ) + \frac {2}{21} \, \log \left ({\left | {\left (x^{7} + 1\right )}^{\frac {1}{3}} - 1 \right |}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^7+1)^(2/3)/x^8,x, algorithm="giac")

[Out]

2/21*sqrt(3)*arctan(1/3*sqrt(3)*(2*(x^7 + 1)^(1/3) + 1)) - 1/7*(x^7 + 1)^(2/3)/x^7 - 1/21*log((x^7 + 1)^(2/3)
+ (x^7 + 1)^(1/3) + 1) + 2/21*log(abs((x^7 + 1)^(1/3) - 1))

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Mupad [B]
time = 0.37, size = 92, normalized size = 1.31 \begin {gather*} \frac {2\,\ln \left (\frac {4\,{\left (x^7+1\right )}^{1/3}}{49}-\frac {4}{49}\right )}{21}+\ln \left (\frac {4\,{\left (x^7+1\right )}^{1/3}}{49}-9\,{\left (-\frac {1}{21}+\frac {\sqrt {3}\,1{}\mathrm {i}}{21}\right )}^2\right )\,\left (-\frac {1}{21}+\frac {\sqrt {3}\,1{}\mathrm {i}}{21}\right )-\ln \left (\frac {4\,{\left (x^7+1\right )}^{1/3}}{49}-9\,{\left (\frac {1}{21}+\frac {\sqrt {3}\,1{}\mathrm {i}}{21}\right )}^2\right )\,\left (\frac {1}{21}+\frac {\sqrt {3}\,1{}\mathrm {i}}{21}\right )-\frac {{\left (x^7+1\right )}^{2/3}}{7\,x^7} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x^7 + 1)^(2/3)/x^8,x)

[Out]

(2*log((4*(x^7 + 1)^(1/3))/49 - 4/49))/21 + log((4*(x^7 + 1)^(1/3))/49 - 9*((3^(1/2)*1i)/21 - 1/21)^2)*((3^(1/
2)*1i)/21 - 1/21) - log((4*(x^7 + 1)^(1/3))/49 - 9*((3^(1/2)*1i)/21 + 1/21)^2)*((3^(1/2)*1i)/21 + 1/21) - (x^7
+ 1)^(2/3)/(7*x^7)

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