Integrand size = 15, antiderivative size = 123 \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=-\frac {5 a x^2 \sqrt [3]{a+b x^3}}{18 b^2}+\frac {x^5 \sqrt [3]{a+b x^3}}{6 b}-\frac {5 a^2 \arctan \left (\frac {1+\frac {2 \sqrt [3]{b} x}{\sqrt [3]{a+b x^3}}}{\sqrt {3}}\right )}{9 \sqrt {3} b^{8/3}}-\frac {5 a^2 \log \left (\sqrt [3]{b} x-\sqrt [3]{a+b x^3}\right )}{18 b^{8/3}} \] Output:
-5/18*a*x^2*(b*x^3+a)^(1/3)/b^2+1/6*x^5*(b*x^3+a)^(1/3)/b-5/27*a^2*arctan( 1/3*(1+2*b^(1/3)*x/(b*x^3+a)^(1/3))*3^(1/2))*3^(1/2)/b^(8/3)-5/18*a^2*ln(b ^(1/3)*x-(b*x^3+a)^(1/3))/b^(8/3)
Time = 0.32 (sec) , antiderivative size = 170, normalized size of antiderivative = 1.38 \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\frac {\sqrt [3]{a+b x^3} \left (-5 a x^2+3 b x^5\right )}{18 b^2}-\frac {5 a^2 \arctan \left (\frac {\sqrt {3} \sqrt [3]{b} x}{\sqrt [3]{b} x+2 \sqrt [3]{a+b x^3}}\right )}{9 \sqrt {3} b^{8/3}}-\frac {5 a^2 \log \left (-\sqrt [3]{b} x+\sqrt [3]{a+b x^3}\right )}{27 b^{8/3}}+\frac {5 a^2 \log \left (b^{2/3} x^2+\sqrt [3]{b} x \sqrt [3]{a+b x^3}+\left (a+b x^3\right )^{2/3}\right )}{54 b^{8/3}} \] Input:
Integrate[x^7/(a + b*x^3)^(2/3),x]
Output:
((a + b*x^3)^(1/3)*(-5*a*x^2 + 3*b*x^5))/(18*b^2) - (5*a^2*ArcTan[(Sqrt[3] *b^(1/3)*x)/(b^(1/3)*x + 2*(a + b*x^3)^(1/3))])/(9*Sqrt[3]*b^(8/3)) - (5*a ^2*Log[-(b^(1/3)*x) + (a + b*x^3)^(1/3)])/(27*b^(8/3)) + (5*a^2*Log[b^(2/3 )*x^2 + b^(1/3)*x*(a + b*x^3)^(1/3) + (a + b*x^3)^(2/3)])/(54*b^(8/3))
Time = 0.34 (sec) , antiderivative size = 132, normalized size of antiderivative = 1.07, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {843, 843, 853}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx\) |
\(\Big \downarrow \) 843 |
\(\displaystyle \frac {x^5 \sqrt [3]{a+b x^3}}{6 b}-\frac {5 a \int \frac {x^4}{\left (b x^3+a\right )^{2/3}}dx}{6 b}\) |
\(\Big \downarrow \) 843 |
\(\displaystyle \frac {x^5 \sqrt [3]{a+b x^3}}{6 b}-\frac {5 a \left (\frac {x^2 \sqrt [3]{a+b x^3}}{3 b}-\frac {2 a \int \frac {x}{\left (b x^3+a\right )^{2/3}}dx}{3 b}\right )}{6 b}\) |
\(\Big \downarrow \) 853 |
\(\displaystyle \frac {x^5 \sqrt [3]{a+b x^3}}{6 b}-\frac {5 a \left (\frac {x^2 \sqrt [3]{a+b x^3}}{3 b}-\frac {2 a \left (-\frac {\arctan \left (\frac {\frac {2 \sqrt [3]{b} x}{\sqrt [3]{a+b x^3}}+1}{\sqrt {3}}\right )}{\sqrt {3} b^{2/3}}-\frac {\log \left (\sqrt [3]{b} x-\sqrt [3]{a+b x^3}\right )}{2 b^{2/3}}\right )}{3 b}\right )}{6 b}\) |
Input:
Int[x^7/(a + b*x^3)^(2/3),x]
Output:
(x^5*(a + b*x^3)^(1/3))/(6*b) - (5*a*((x^2*(a + b*x^3)^(1/3))/(3*b) - (2*a *(-(ArcTan[(1 + (2*b^(1/3)*x)/(a + b*x^3)^(1/3))/Sqrt[3]]/(Sqrt[3]*b^(2/3) )) - Log[b^(1/3)*x - (a + b*x^3)^(1/3)]/(2*b^(2/3))))/(3*b)))/(6*b)
Int[((c_.)*(x_))^(m_)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[c^(n - 1)*(c*x)^(m - n + 1)*((a + b*x^n)^(p + 1)/(b*(m + n*p + 1))), x] - Simp[ a*c^n*((m - n + 1)/(b*(m + n*p + 1))) Int[(c*x)^(m - n)*(a + b*x^n)^p, x] , x] /; FreeQ[{a, b, c, p}, x] && IGtQ[n, 0] && GtQ[m, n - 1] && NeQ[m + n* p + 1, 0] && IntBinomialQ[a, b, c, n, m, p, x]
Int[(x_)/((a_) + (b_.)*(x_)^3)^(2/3), x_Symbol] :> With[{q = Rt[b, 3]}, Sim p[-ArcTan[(1 + 2*q*(x/(a + b*x^3)^(1/3)))/Sqrt[3]]/(Sqrt[3]*q^2), x] - Simp [Log[q*x - (a + b*x^3)^(1/3)]/(2*q^2), x]] /; FreeQ[{a, b}, x]
Time = 1.04 (sec) , antiderivative size = 146, normalized size of antiderivative = 1.19
method | result | size |
pseudoelliptic | \(\frac {9 x^{5} \left (b \,x^{3}+a \right )^{\frac {1}{3}} b^{\frac {5}{3}}-15 a \,x^{2} b^{\frac {2}{3}} \left (b \,x^{3}+a \right )^{\frac {1}{3}}+10 \sqrt {3}\, \arctan \left (\frac {\sqrt {3}\, \left (b^{\frac {1}{3}} x +2 \left (b \,x^{3}+a \right )^{\frac {1}{3}}\right )}{3 b^{\frac {1}{3}} x}\right ) a^{2}-10 \ln \left (\frac {-b^{\frac {1}{3}} x +\left (b \,x^{3}+a \right )^{\frac {1}{3}}}{x}\right ) a^{2}+5 \ln \left (\frac {b^{\frac {2}{3}} x^{2}+b^{\frac {1}{3}} \left (b \,x^{3}+a \right )^{\frac {1}{3}} x +\left (b \,x^{3}+a \right )^{\frac {2}{3}}}{x^{2}}\right ) a^{2}}{54 b^{\frac {8}{3}}}\) | \(146\) |
Input:
int(x^7/(b*x^3+a)^(2/3),x,method=_RETURNVERBOSE)
Output:
1/54/b^(8/3)*(9*x^5*(b*x^3+a)^(1/3)*b^(5/3)-15*a*x^2*b^(2/3)*(b*x^3+a)^(1/ 3)+10*3^(1/2)*arctan(1/3*3^(1/2)*(b^(1/3)*x+2*(b*x^3+a)^(1/3))/b^(1/3)/x)* a^2-10*ln((-b^(1/3)*x+(b*x^3+a)^(1/3))/x)*a^2+5*ln((b^(2/3)*x^2+b^(1/3)*(b *x^3+a)^(1/3)*x+(b*x^3+a)^(2/3))/x^2)*a^2)
Time = 0.09 (sec) , antiderivative size = 179, normalized size of antiderivative = 1.46 \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\frac {30 \, \sqrt {\frac {1}{3}} a^{2} {\left (b^{2}\right )}^{\frac {1}{6}} b \arctan \left (\frac {\sqrt {\frac {1}{3}} {\left ({\left (b^{2}\right )}^{\frac {1}{3}} b x + 2 \, {\left (b x^{3} + a\right )}^{\frac {1}{3}} {\left (b^{2}\right )}^{\frac {2}{3}}\right )} {\left (b^{2}\right )}^{\frac {1}{6}}}{b^{2} x}\right ) - 10 \, a^{2} {\left (b^{2}\right )}^{\frac {2}{3}} \log \left (-\frac {{\left (b^{2}\right )}^{\frac {2}{3}} x - {\left (b x^{3} + a\right )}^{\frac {1}{3}} b}{x}\right ) + 5 \, a^{2} {\left (b^{2}\right )}^{\frac {2}{3}} \log \left (\frac {{\left (b^{2}\right )}^{\frac {1}{3}} b x^{2} + {\left (b x^{3} + a\right )}^{\frac {1}{3}} {\left (b^{2}\right )}^{\frac {2}{3}} x + {\left (b x^{3} + a\right )}^{\frac {2}{3}} b}{x^{2}}\right ) + 3 \, {\left (3 \, b^{3} x^{5} - 5 \, a b^{2} x^{2}\right )} {\left (b x^{3} + a\right )}^{\frac {1}{3}}}{54 \, b^{4}} \] Input:
integrate(x^7/(b*x^3+a)^(2/3),x, algorithm="fricas")
Output:
1/54*(30*sqrt(1/3)*a^2*(b^2)^(1/6)*b*arctan(sqrt(1/3)*((b^2)^(1/3)*b*x + 2 *(b*x^3 + a)^(1/3)*(b^2)^(2/3))*(b^2)^(1/6)/(b^2*x)) - 10*a^2*(b^2)^(2/3)* log(-((b^2)^(2/3)*x - (b*x^3 + a)^(1/3)*b)/x) + 5*a^2*(b^2)^(2/3)*log(((b^ 2)^(1/3)*b*x^2 + (b*x^3 + a)^(1/3)*(b^2)^(2/3)*x + (b*x^3 + a)^(2/3)*b)/x^ 2) + 3*(3*b^3*x^5 - 5*a*b^2*x^2)*(b*x^3 + a)^(1/3))/b^4
Result contains complex when optimal does not.
Time = 1.63 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.30 \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\frac {x^{8} \Gamma \left (\frac {8}{3}\right ) {{}_{2}F_{1}\left (\begin {matrix} \frac {2}{3}, \frac {8}{3} \\ \frac {11}{3} \end {matrix}\middle | {\frac {b x^{3} e^{i \pi }}{a}} \right )}}{3 a^{\frac {2}{3}} \Gamma \left (\frac {11}{3}\right )} \] Input:
integrate(x**7/(b*x**3+a)**(2/3),x)
Output:
x**8*gamma(8/3)*hyper((2/3, 8/3), (11/3,), b*x**3*exp_polar(I*pi)/a)/(3*a* *(2/3)*gamma(11/3))
Time = 0.12 (sec) , antiderivative size = 184, normalized size of antiderivative = 1.50 \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\frac {5 \, \sqrt {3} a^{2} \arctan \left (\frac {\sqrt {3} {\left (b^{\frac {1}{3}} + \frac {2 \, {\left (b x^{3} + a\right )}^{\frac {1}{3}}}{x}\right )}}{3 \, b^{\frac {1}{3}}}\right )}{27 \, b^{\frac {8}{3}}} + \frac {5 \, a^{2} \log \left (b^{\frac {2}{3}} + \frac {{\left (b x^{3} + a\right )}^{\frac {1}{3}} b^{\frac {1}{3}}}{x} + \frac {{\left (b x^{3} + a\right )}^{\frac {2}{3}}}{x^{2}}\right )}{54 \, b^{\frac {8}{3}}} - \frac {5 \, a^{2} \log \left (-b^{\frac {1}{3}} + \frac {{\left (b x^{3} + a\right )}^{\frac {1}{3}}}{x}\right )}{27 \, b^{\frac {8}{3}}} + \frac {\frac {8 \, {\left (b x^{3} + a\right )}^{\frac {1}{3}} a^{2} b}{x} - \frac {5 \, {\left (b x^{3} + a\right )}^{\frac {4}{3}} a^{2}}{x^{4}}}{18 \, {\left (b^{4} - \frac {2 \, {\left (b x^{3} + a\right )} b^{3}}{x^{3}} + \frac {{\left (b x^{3} + a\right )}^{2} b^{2}}{x^{6}}\right )}} \] Input:
integrate(x^7/(b*x^3+a)^(2/3),x, algorithm="maxima")
Output:
5/27*sqrt(3)*a^2*arctan(1/3*sqrt(3)*(b^(1/3) + 2*(b*x^3 + a)^(1/3)/x)/b^(1 /3))/b^(8/3) + 5/54*a^2*log(b^(2/3) + (b*x^3 + a)^(1/3)*b^(1/3)/x + (b*x^3 + a)^(2/3)/x^2)/b^(8/3) - 5/27*a^2*log(-b^(1/3) + (b*x^3 + a)^(1/3)/x)/b^ (8/3) + 1/18*(8*(b*x^3 + a)^(1/3)*a^2*b/x - 5*(b*x^3 + a)^(4/3)*a^2/x^4)/( b^4 - 2*(b*x^3 + a)*b^3/x^3 + (b*x^3 + a)^2*b^2/x^6)
\[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\int { \frac {x^{7}}{{\left (b x^{3} + a\right )}^{\frac {2}{3}}} \,d x } \] Input:
integrate(x^7/(b*x^3+a)^(2/3),x, algorithm="giac")
Output:
integrate(x^7/(b*x^3 + a)^(2/3), x)
Timed out. \[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\int \frac {x^7}{{\left (b\,x^3+a\right )}^{2/3}} \,d x \] Input:
int(x^7/(a + b*x^3)^(2/3),x)
Output:
int(x^7/(a + b*x^3)^(2/3), x)
\[ \int \frac {x^7}{\left (a+b x^3\right )^{2/3}} \, dx=\int \frac {x^{7}}{\left (b \,x^{3}+a \right )^{\frac {2}{3}}}d x \] Input:
int(x^7/(b*x^3+a)^(2/3),x)
Output:
int(x**7/(a + b*x**3)**(2/3),x)