3.11.12 \(\int x^2 \sqrt [6]{a+b x^2} \, dx\) [1012]

3.11.12.1 Optimal result

Integrand size = 15, antiderivative size = 297 \[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\frac {3 a x \sqrt [6]{a+b x^2}}{40 b}+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}-\frac {3\ 3^{3/4} \sqrt {2-\sqrt {3}} a^2 \sqrt [6]{a+b x^2} \left (1-\sqrt [3]{\frac {a}{a+b x^2}}\right ) \sqrt {\frac {1+\sqrt [3]{\frac {a}{a+b x^2}}+\left (\frac {a}{a+b x^2}\right )^{2/3}}{\left (1-\sqrt {3}-\sqrt [3]{\frac {a}{a+b x^2}}\right )^2}} \operatorname {EllipticF}\left (\arcsin \left (\frac {1+\sqrt {3}-\sqrt [3]{\frac {a}{a+b x^2}}}{1-\sqrt {3}-\sqrt [3]{\frac {a}{a+b x^2}}}\right ),-7+4 \sqrt {3}\right )}{40 b^2 x \sqrt [3]{\frac {a}{a+b x^2}} \sqrt {-\frac {1-\sqrt [3]{\frac {a}{a+b x^2}}}{\left (1-\sqrt {3}-\sqrt [3]{\frac {a}{a+b x^2}}\right )^2}}} \]

output

3/40*a*x*(b*x^2+a)^(1/6)/b+3/10*x^3*(b*x^2+a)^(1/6)-3/40*3^(3/4)*a^2*(b*x^ 
2+a)^(1/6)*(1-(a/(b*x^2+a))^(1/3))*EllipticF((1-(a/(b*x^2+a))^(1/3)+3^(1/2 
))/(1-(a/(b*x^2+a))^(1/3)-3^(1/2)),2*I-I*3^(1/2))*(1/2*6^(1/2)-1/2*2^(1/2) 
)*((1+(a/(b*x^2+a))^(1/3)+(a/(b*x^2+a))^(2/3))/(1-(a/(b*x^2+a))^(1/3)-3^(1 
/2))^2)^(1/2)/b^2/x/(a/(b*x^2+a))^(1/3)/((-1+(a/(b*x^2+a))^(1/3))/(1-(a/(b 
*x^2+a))^(1/3)-3^(1/2))^2)^(1/2)
 

3.11.12.2 Mathematica [C] (verified)

Result contains higher order function than in optimal. Order 5 vs. order 4 in optimal.

Time = 7.30 (sec) , antiderivative size = 62, normalized size of antiderivative = 0.21 \[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\frac {3 x \sqrt [6]{a+b x^2} \left (a+b x^2-\frac {a \operatorname {Hypergeometric2F1}\left (-\frac {1}{6},\frac {1}{2},\frac {3}{2},-\frac {b x^2}{a}\right )}{\sqrt [6]{1+\frac {b x^2}{a}}}\right )}{10 b} \]

input

Integrate[x^2*(a + b*x^2)^(1/6),x]
 

output

(3*x*(a + b*x^2)^(1/6)*(a + b*x^2 - (a*Hypergeometric2F1[-1/6, 1/2, 3/2, - 
((b*x^2)/a)])/(1 + (b*x^2)/a)^(1/6)))/(10*b)
 

3.11.12.3 Rubi [A] (warning: unable to verify)

Time = 0.28 (sec) , antiderivative size = 380, normalized size of antiderivative = 1.28, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {248, 262, 236, 234, 760}

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.

\(\displaystyle \int x^2 \sqrt [6]{a+b x^2} \, dx\)

\(\Big \downarrow \) 248

\(\displaystyle \frac {1}{10} a \int \frac {x^2}{\left (b x^2+a\right )^{5/6}}dx+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}\)

\(\Big \downarrow \) 262

\(\displaystyle \frac {1}{10} a \left (\frac {3 x \sqrt [6]{a+b x^2}}{4 b}-\frac {3 a \int \frac {1}{\left (b x^2+a\right )^{5/6}}dx}{4 b}\right )+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}\)

\(\Big \downarrow \) 236

\(\displaystyle \frac {1}{10} a \left (\frac {3 x \sqrt [6]{a+b x^2}}{4 b}-\frac {3 a \int \frac {1}{\left (1-\frac {b x^2}{b x^2+a}\right )^{2/3}}d\frac {x}{\sqrt {b x^2+a}}}{4 b \sqrt [3]{\frac {a}{a+b x^2}} \sqrt [3]{a+b x^2}}\right )+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}\)

\(\Big \downarrow \) 234

\(\displaystyle \frac {1}{10} a \left (\frac {9 a \sqrt {-\frac {b x^2}{a+b x^2}} \sqrt [6]{a+b x^2} \int \frac {1}{\sqrt {\frac {x^3}{\left (b x^2+a\right )^{3/2}}-1}}d\sqrt [3]{1-\frac {b x^2}{b x^2+a}}}{8 b^2 x \sqrt [3]{\frac {a}{a+b x^2}}}+\frac {3 x \sqrt [6]{a+b x^2}}{4 b}\right )+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}\)

\(\Big \downarrow \) 760

\(\displaystyle \frac {1}{10} a \left (\frac {3 x \sqrt [6]{a+b x^2}}{4 b}-\frac {3\ 3^{3/4} \sqrt {2-\sqrt {3}} a \sqrt {-\frac {b x^2}{a+b x^2}} \sqrt [6]{a+b x^2} \left (1-\sqrt [3]{1-\frac {b x^2}{a+b x^2}}\right ) \sqrt {\frac {\frac {x^2}{a+b x^2}+\sqrt [3]{1-\frac {b x^2}{a+b x^2}}+1}{\left (-\sqrt [3]{1-\frac {b x^2}{a+b x^2}}-\sqrt {3}+1\right )^2}} \operatorname {EllipticF}\left (\arcsin \left (\frac {-\sqrt [3]{1-\frac {b x^2}{b x^2+a}}+\sqrt {3}+1}{-\sqrt [3]{1-\frac {b x^2}{b x^2+a}}-\sqrt {3}+1}\right ),-7+4 \sqrt {3}\right )}{4 b^2 x \sqrt [3]{\frac {a}{a+b x^2}} \sqrt {\frac {x^3}{\left (a+b x^2\right )^{3/2}}-1} \sqrt {-\frac {1-\sqrt [3]{1-\frac {b x^2}{a+b x^2}}}{\left (-\sqrt [3]{1-\frac {b x^2}{a+b x^2}}-\sqrt {3}+1\right )^2}}}\right )+\frac {3}{10} x^3 \sqrt [6]{a+b x^2}\)

input

Int[x^2*(a + b*x^2)^(1/6),x]
 

output

(3*x^3*(a + b*x^2)^(1/6))/10 + (a*((3*x*(a + b*x^2)^(1/6))/(4*b) - (3*3^(3 
/4)*Sqrt[2 - Sqrt[3]]*a*Sqrt[-((b*x^2)/(a + b*x^2))]*(a + b*x^2)^(1/6)*(1 
- (1 - (b*x^2)/(a + b*x^2))^(1/3))*Sqrt[(1 + x^2/(a + b*x^2) + (1 - (b*x^2 
)/(a + b*x^2))^(1/3))/(1 - Sqrt[3] - (1 - (b*x^2)/(a + b*x^2))^(1/3))^2]*E 
llipticF[ArcSin[(1 + Sqrt[3] - (1 - (b*x^2)/(a + b*x^2))^(1/3))/(1 - Sqrt[ 
3] - (1 - (b*x^2)/(a + b*x^2))^(1/3))], -7 + 4*Sqrt[3]])/(4*b^2*x*(a/(a + 
b*x^2))^(1/3)*Sqrt[-1 + x^3/(a + b*x^2)^(3/2)]*Sqrt[-((1 - (1 - (b*x^2)/(a 
 + b*x^2))^(1/3))/(1 - Sqrt[3] - (1 - (b*x^2)/(a + b*x^2))^(1/3))^2)])))/1 
0
 

3.11.12.3.1 Defintions of rubi rules used

rule 234

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

rule 236

Int[((a_) + (b_.)*(x_)^2)^(-5/6), x_Symbol] :> Simp[1/((a/(a + b*x^2))^(1/3 
)*(a + b*x^2)^(1/3))   Subst[Int[1/(1 - b*x^2)^(2/3), x], x, x/Sqrt[a + b*x 
^2]], x] /; FreeQ[{a, b}, x]
 

rule 248

Int[((c_.)*(x_))^(m_.)*((a_) + (b_.)*(x_)^2)^(p_), x_Symbol] :> Simp[(c*x)^ 
(m + 1)*((a + b*x^2)^p/(c*(m + 2*p + 1))), x] + Simp[2*a*(p/(m + 2*p + 1)) 
  Int[(c*x)^m*(a + b*x^2)^(p - 1), x], x] /; FreeQ[{a, b, c, m}, x] && GtQ[ 
p, 0] && NeQ[m + 2*p + 1, 0] && IntBinomialQ[a, b, c, 2, m, p, x]
 

rule 262

Int[((c_.)*(x_))^(m_)*((a_) + (b_.)*(x_)^2)^(p_), x_Symbol] :> Simp[c*(c*x) 
^(m - 1)*((a + b*x^2)^(p + 1)/(b*(m + 2*p + 1))), x] - Simp[a*c^2*((m - 1)/ 
(b*(m + 2*p + 1)))   Int[(c*x)^(m - 2)*(a + b*x^2)^p, x], x] /; FreeQ[{a, b 
, c, p}, x] && GtQ[m, 2 - 1] && NeQ[m + 2*p + 1, 0] && IntBinomialQ[a, b, c 
, 2, m, p, x]
 

rule 760

Int[1/Sqrt[(a_) + (b_.)*(x_)^3], x_Symbol] :> With[{r = Numer[Rt[b/a, 3]], 
s = Denom[Rt[b/a, 3]]}, Simp[2*Sqrt[2 - Sqrt[3]]*(s + r*x)*(Sqrt[(s^2 - r*s 
*x + r^2*x^2)/((1 - Sqrt[3])*s + r*x)^2]/(3^(1/4)*r*Sqrt[a + b*x^3]*Sqrt[(- 
s)*((s + r*x)/((1 - Sqrt[3])*s + r*x)^2)]))*EllipticF[ArcSin[((1 + Sqrt[3]) 
*s + r*x)/((1 - Sqrt[3])*s + r*x)], -7 + 4*Sqrt[3]], x]] /; FreeQ[{a, b}, x 
] && NegQ[a]
 

3.11.12.4 Maple [F]

\[\int x^{2} \left (b \,x^{2}+a \right )^{\frac {1}{6}}d x\]

input

int(x^2*(b*x^2+a)^(1/6),x)
 

output

int(x^2*(b*x^2+a)^(1/6),x)
 

3.11.12.5 Fricas [F]

\[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\int { {\left (b x^{2} + a\right )}^{\frac {1}{6}} x^{2} \,d x } \]

input

integrate(x^2*(b*x^2+a)^(1/6),x, algorithm="fricas")
 

output

integral((b*x^2 + a)^(1/6)*x^2, x)
 

3.11.12.6 Sympy [A] (verification not implemented)

Time = 0.54 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.10 \[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\frac {\sqrt [6]{a} x^{3} {{}_{2}F_{1}\left (\begin {matrix} - \frac {1}{6}, \frac {3}{2} \\ \frac {5}{2} \end {matrix}\middle | {\frac {b x^{2} e^{i \pi }}{a}} \right )}}{3} \]

input

integrate(x**2*(b*x**2+a)**(1/6),x)
 

output

a**(1/6)*x**3*hyper((-1/6, 3/2), (5/2,), b*x**2*exp_polar(I*pi)/a)/3
 

3.11.12.7 Maxima [F]

\[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\int { {\left (b x^{2} + a\right )}^{\frac {1}{6}} x^{2} \,d x } \]

input

integrate(x^2*(b*x^2+a)^(1/6),x, algorithm="maxima")
 

output

integrate((b*x^2 + a)^(1/6)*x^2, x)
 

3.11.12.8 Giac [F]

\[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\int { {\left (b x^{2} + a\right )}^{\frac {1}{6}} x^{2} \,d x } \]

input

integrate(x^2*(b*x^2+a)^(1/6),x, algorithm="giac")
 

output

integrate((b*x^2 + a)^(1/6)*x^2, x)
 

3.11.12.9 Mupad [F(-1)]

Timed out. \[ \int x^2 \sqrt [6]{a+b x^2} \, dx=\int x^2\,{\left (b\,x^2+a\right )}^{1/6} \,d x \]

input

int(x^2*(a + b*x^2)^(1/6),x)
 

output

int(x^2*(a + b*x^2)^(1/6), x)