3.511 \(\int x^8 \sqrt [3]{a+b x^3} \, dx\)

Optimal. Leaf size=59 \[ \frac {a^2 \left (a+b x^3\right )^{4/3}}{4 b^3}+\frac {\left (a+b x^3\right )^{10/3}}{10 b^3}-\frac {2 a \left (a+b x^3\right )^{7/3}}{7 b^3} \]

[Out]

1/4*a^2*(b*x^3+a)^(4/3)/b^3-2/7*a*(b*x^3+a)^(7/3)/b^3+1/10*(b*x^3+a)^(10/3)/b^3

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Rubi [A]  time = 0.03, antiderivative size = 59, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.133, Rules used = {266, 43} \[ \frac {a^2 \left (a+b x^3\right )^{4/3}}{4 b^3}+\frac {\left (a+b x^3\right )^{10/3}}{10 b^3}-\frac {2 a \left (a+b x^3\right )^{7/3}}{7 b^3} \]

Antiderivative was successfully verified.

[In]

Int[x^8*(a + b*x^3)^(1/3),x]

[Out]

(a^2*(a + b*x^3)^(4/3))/(4*b^3) - (2*a*(a + b*x^3)^(7/3))/(7*b^3) + (a + b*x^3)^(10/3)/(10*b^3)

Rule 43

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*x)^m*(c + d
*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && NeQ[b*c - a*d, 0] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0]
&& LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])

Rule 266

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]]

Rubi steps

\begin {align*} \int x^8 \sqrt [3]{a+b x^3} \, dx &=\frac {1}{3} \operatorname {Subst}\left (\int x^2 \sqrt [3]{a+b x} \, dx,x,x^3\right )\\ &=\frac {1}{3} \operatorname {Subst}\left (\int \left (\frac {a^2 \sqrt [3]{a+b x}}{b^2}-\frac {2 a (a+b x)^{4/3}}{b^2}+\frac {(a+b x)^{7/3}}{b^2}\right ) \, dx,x,x^3\right )\\ &=\frac {a^2 \left (a+b x^3\right )^{4/3}}{4 b^3}-\frac {2 a \left (a+b x^3\right )^{7/3}}{7 b^3}+\frac {\left (a+b x^3\right )^{10/3}}{10 b^3}\\ \end {align*}

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Mathematica [A]  time = 0.03, size = 39, normalized size = 0.66 \[ \frac {\left (a+b x^3\right )^{4/3} \left (9 a^2-12 a b x^3+14 b^2 x^6\right )}{140 b^3} \]

Antiderivative was successfully verified.

[In]

Integrate[x^8*(a + b*x^3)^(1/3),x]

[Out]

((a + b*x^3)^(4/3)*(9*a^2 - 12*a*b*x^3 + 14*b^2*x^6))/(140*b^3)

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fricas [A]  time = 0.83, size = 46, normalized size = 0.78 \[ \frac {{\left (14 \, b^{3} x^{9} + 2 \, a b^{2} x^{6} - 3 \, a^{2} b x^{3} + 9 \, a^{3}\right )} {\left (b x^{3} + a\right )}^{\frac {1}{3}}}{140 \, b^{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^8*(b*x^3+a)^(1/3),x, algorithm="fricas")

[Out]

1/140*(14*b^3*x^9 + 2*a*b^2*x^6 - 3*a^2*b*x^3 + 9*a^3)*(b*x^3 + a)^(1/3)/b^3

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giac [A]  time = 0.16, size = 43, normalized size = 0.73 \[ \frac {14 \, {\left (b x^{3} + a\right )}^{\frac {10}{3}} - 40 \, {\left (b x^{3} + a\right )}^{\frac {7}{3}} a + 35 \, {\left (b x^{3} + a\right )}^{\frac {4}{3}} a^{2}}{140 \, b^{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^8*(b*x^3+a)^(1/3),x, algorithm="giac")

[Out]

1/140*(14*(b*x^3 + a)^(10/3) - 40*(b*x^3 + a)^(7/3)*a + 35*(b*x^3 + a)^(4/3)*a^2)/b^3

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maple [A]  time = 0.01, size = 36, normalized size = 0.61 \[ \frac {\left (b \,x^{3}+a \right )^{\frac {4}{3}} \left (14 b^{2} x^{6}-12 a b \,x^{3}+9 a^{2}\right )}{140 b^{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^8*(b*x^3+a)^(1/3),x)

[Out]

1/140*(b*x^3+a)^(4/3)*(14*b^2*x^6-12*a*b*x^3+9*a^2)/b^3

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maxima [A]  time = 1.32, size = 47, normalized size = 0.80 \[ \frac {{\left (b x^{3} + a\right )}^{\frac {10}{3}}}{10 \, b^{3}} - \frac {2 \, {\left (b x^{3} + a\right )}^{\frac {7}{3}} a}{7 \, b^{3}} + \frac {{\left (b x^{3} + a\right )}^{\frac {4}{3}} a^{2}}{4 \, b^{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^8*(b*x^3+a)^(1/3),x, algorithm="maxima")

[Out]

1/10*(b*x^3 + a)^(10/3)/b^3 - 2/7*(b*x^3 + a)^(7/3)*a/b^3 + 1/4*(b*x^3 + a)^(4/3)*a^2/b^3

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mupad [B]  time = 1.05, size = 44, normalized size = 0.75 \[ {\left (b\,x^3+a\right )}^{1/3}\,\left (\frac {x^9}{10}+\frac {9\,a^3}{140\,b^3}+\frac {a\,x^6}{70\,b}-\frac {3\,a^2\,x^3}{140\,b^2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^8*(a + b*x^3)^(1/3),x)

[Out]

(a + b*x^3)^(1/3)*(x^9/10 + (9*a^3)/(140*b^3) + (a*x^6)/(70*b) - (3*a^2*x^3)/(140*b^2))

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sympy [A]  time = 4.47, size = 87, normalized size = 1.47 \[ \begin {cases} \frac {9 a^{3} \sqrt [3]{a + b x^{3}}}{140 b^{3}} - \frac {3 a^{2} x^{3} \sqrt [3]{a + b x^{3}}}{140 b^{2}} + \frac {a x^{6} \sqrt [3]{a + b x^{3}}}{70 b} + \frac {x^{9} \sqrt [3]{a + b x^{3}}}{10} & \text {for}\: b \neq 0 \\\frac {\sqrt [3]{a} x^{9}}{9} & \text {otherwise} \end {cases} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**8*(b*x**3+a)**(1/3),x)

[Out]

Piecewise((9*a**3*(a + b*x**3)**(1/3)/(140*b**3) - 3*a**2*x**3*(a + b*x**3)**(1/3)/(140*b**2) + a*x**6*(a + b*
x**3)**(1/3)/(70*b) + x**9*(a + b*x**3)**(1/3)/10, Ne(b, 0)), (a**(1/3)*x**9/9, True))

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