Integrand size = 15, antiderivative size = 222 \[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\frac {2}{15} x \left (-2+3 x^2\right )^{3/4}+\frac {8 x \sqrt [4]{-2+3 x^2}}{15 \left (\sqrt {2}+\sqrt {-2+3 x^2}\right )}-\frac {8 \sqrt [4]{2} \sqrt {\frac {x^2}{\left (\sqrt {2}+\sqrt {-2+3 x^2}\right )^2}} \left (\sqrt {2}+\sqrt {-2+3 x^2}\right ) E\left (2 \arctan \left (\frac {\sqrt [4]{-2+3 x^2}}{\sqrt [4]{2}}\right )|\frac {1}{2}\right )}{15 \sqrt {3} x}+\frac {4 \sqrt [4]{2} \sqrt {\frac {x^2}{\left (\sqrt {2}+\sqrt {-2+3 x^2}\right )^2}} \left (\sqrt {2}+\sqrt {-2+3 x^2}\right ) \operatorname {EllipticF}\left (2 \arctan \left (\frac {\sqrt [4]{-2+3 x^2}}{\sqrt [4]{2}}\right ),\frac {1}{2}\right )}{15 \sqrt {3} x} \]
2/15*x*(3*x^2-2)^(3/4)+8/15*x*(3*x^2-2)^(1/4)/(2^(1/2)+(3*x^2-2)^(1/2))-8/ 45*2^(1/4)*(cos(2*arctan(1/2*(3*x^2-2)^(1/4)*2^(3/4)))^2)^(1/2)/cos(2*arct an(1/2*(3*x^2-2)^(1/4)*2^(3/4)))*EllipticE(sin(2*arctan(1/2*(3*x^2-2)^(1/4 )*2^(3/4))),1/2*2^(1/2))*(2^(1/2)+(3*x^2-2)^(1/2))*(x^2/(2^(1/2)+(3*x^2-2) ^(1/2))^2)^(1/2)/x*3^(1/2)+4/45*2^(1/4)*(cos(2*arctan(1/2*(3*x^2-2)^(1/4)* 2^(3/4)))^2)^(1/2)/cos(2*arctan(1/2*(3*x^2-2)^(1/4)*2^(3/4)))*EllipticF(si n(2*arctan(1/2*(3*x^2-2)^(1/4)*2^(3/4))),1/2*2^(1/2))*(2^(1/2)+(3*x^2-2)^( 1/2))*(x^2/(2^(1/2)+(3*x^2-2)^(1/2))^2)^(1/2)/x*3^(1/2)
Result contains higher order function than in optimal. Order 5 vs. order 4 in optimal.
Time = 5.25 (sec) , antiderivative size = 57, normalized size of antiderivative = 0.26 \[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\frac {2 x \left (-2+3 x^2+2^{3/4} \sqrt [4]{2-3 x^2} \operatorname {Hypergeometric2F1}\left (\frac {1}{4},\frac {1}{2},\frac {3}{2},\frac {3 x^2}{2}\right )\right )}{15 \sqrt [4]{-2+3 x^2}} \]
(2*x*(-2 + 3*x^2 + 2^(3/4)*(2 - 3*x^2)^(1/4)*Hypergeometric2F1[1/4, 1/2, 3 /2, (3*x^2)/2]))/(15*(-2 + 3*x^2)^(1/4))
Time = 0.28 (sec) , antiderivative size = 243, normalized size of antiderivative = 1.09, number of steps used = 8, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.467, Rules used = {262, 228, 27, 834, 27, 761, 1510}
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.
\(\displaystyle \int \frac {x^2}{\sqrt [4]{3 x^2-2}} \, dx\) |
\(\Big \downarrow \) 262 |
\(\displaystyle \frac {4}{15} \int \frac {1}{\sqrt [4]{3 x^2-2}}dx+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 228 |
\(\displaystyle \frac {4 \sqrt {\frac {2}{3}} \sqrt {x^2} \int \frac {\sqrt {\frac {2}{3}} \sqrt {3 x^2-2}}{\sqrt {x^2}}d\sqrt [4]{3 x^2-2}}{15 x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {8 \sqrt {x^2} \int \frac {\sqrt {3 x^2-2}}{\sqrt {3} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}}{15 \sqrt {3} x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 834 |
\(\displaystyle \frac {8 \sqrt {x^2} \left (\sqrt {2} \int \frac {1}{\sqrt {3} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}-\sqrt {2} \int \frac {\sqrt {2}-\sqrt {3 x^2-2}}{\sqrt {6} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}\right )}{15 \sqrt {3} x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {8 \sqrt {x^2} \left (\sqrt {2} \int \frac {1}{\sqrt {3} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}-\int \frac {\sqrt {2}-\sqrt {3 x^2-2}}{\sqrt {3} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}\right )}{15 \sqrt {3} x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 761 |
\(\displaystyle \frac {8 \sqrt {x^2} \left (\frac {\sqrt {\frac {x^2}{\left (\sqrt {3 x^2-2}+\sqrt {2}\right )^2}} \left (\sqrt {3 x^2-2}+\sqrt {2}\right ) \operatorname {EllipticF}\left (2 \arctan \left (\frac {\sqrt [4]{3 x^2-2}}{\sqrt [4]{2}}\right ),\frac {1}{2}\right )}{2^{3/4} \sqrt {x^2}}-\int \frac {\sqrt {2}-\sqrt {3 x^2-2}}{\sqrt {3} \sqrt {x^2}}d\sqrt [4]{3 x^2-2}\right )}{15 \sqrt {3} x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
\(\Big \downarrow \) 1510 |
\(\displaystyle \frac {8 \sqrt {x^2} \left (\frac {\sqrt {\frac {x^2}{\left (\sqrt {3 x^2-2}+\sqrt {2}\right )^2}} \left (\sqrt {3 x^2-2}+\sqrt {2}\right ) \operatorname {EllipticF}\left (2 \arctan \left (\frac {\sqrt [4]{3 x^2-2}}{\sqrt [4]{2}}\right ),\frac {1}{2}\right )}{2^{3/4} \sqrt {x^2}}-\frac {\sqrt [4]{2} \sqrt {\frac {x^2}{\left (\sqrt {3 x^2-2}+\sqrt {2}\right )^2}} \left (\sqrt {3 x^2-2}+\sqrt {2}\right ) E\left (2 \arctan \left (\frac {\sqrt [4]{3 x^2-2}}{\sqrt [4]{2}}\right )|\frac {1}{2}\right )}{\sqrt {x^2}}+\frac {\sqrt {3} \sqrt {x^2} \sqrt [4]{3 x^2-2}}{\sqrt {3 x^2-2}+\sqrt {2}}\right )}{15 \sqrt {3} x}+\frac {2}{15} \left (3 x^2-2\right )^{3/4} x\) |
(2*x*(-2 + 3*x^2)^(3/4))/15 + (8*Sqrt[x^2]*((Sqrt[3]*Sqrt[x^2]*(-2 + 3*x^2 )^(1/4))/(Sqrt[2] + Sqrt[-2 + 3*x^2]) - (2^(1/4)*Sqrt[x^2/(Sqrt[2] + Sqrt[ -2 + 3*x^2])^2]*(Sqrt[2] + Sqrt[-2 + 3*x^2])*EllipticE[2*ArcTan[(-2 + 3*x^ 2)^(1/4)/2^(1/4)], 1/2])/Sqrt[x^2] + (Sqrt[x^2/(Sqrt[2] + Sqrt[-2 + 3*x^2] )^2]*(Sqrt[2] + Sqrt[-2 + 3*x^2])*EllipticF[2*ArcTan[(-2 + 3*x^2)^(1/4)/2^ (1/4)], 1/2])/(2^(3/4)*Sqrt[x^2])))/(15*Sqrt[3]*x)
3.9.93.3.1 Defintions of rubi rules used
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[((a_) + (b_.)*(x_)^2)^(-1/4), x_Symbol] :> Simp[2*(Sqrt[(-b)*(x^2/a)]/( b*x)) Subst[Int[x^2/Sqrt[1 - x^4/a], x], x, (a + b*x^2)^(1/4)], x] /; Fre eQ[{a, b}, x] && NegQ[a]
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]
Int[1/Sqrt[(a_) + (b_.)*(x_)^4], x_Symbol] :> With[{q = Rt[b/a, 4]}, Simp[( 1 + q^2*x^2)*(Sqrt[(a + b*x^4)/(a*(1 + q^2*x^2)^2)]/(2*q*Sqrt[a + b*x^4]))* EllipticF[2*ArcTan[q*x], 1/2], x]] /; FreeQ[{a, b}, x] && PosQ[b/a]
Int[(x_)^2/Sqrt[(a_) + (b_.)*(x_)^4], x_Symbol] :> With[{q = Rt[b/a, 2]}, S imp[1/q Int[1/Sqrt[a + b*x^4], x], x] - Simp[1/q Int[(1 - q*x^2)/Sqrt[a + b*x^4], x], x]] /; FreeQ[{a, b}, x] && PosQ[b/a]
Int[((d_) + (e_.)*(x_)^2)/Sqrt[(a_) + (c_.)*(x_)^4], x_Symbol] :> With[{q = Rt[c/a, 4]}, Simp[(-d)*x*(Sqrt[a + c*x^4]/(a*(1 + q^2*x^2))), x] + Simp[d* (1 + q^2*x^2)*(Sqrt[(a + c*x^4)/(a*(1 + q^2*x^2)^2)]/(q*Sqrt[a + c*x^4]))*E llipticE[2*ArcTan[q*x], 1/2], x] /; EqQ[e + d*q^2, 0]] /; FreeQ[{a, c, d, e }, x] && PosQ[c/a]
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 2.18 (sec) , antiderivative size = 42, normalized size of antiderivative = 0.19
method | result | size |
meijerg | \(\frac {2^{\frac {3}{4}} {\left (-\operatorname {signum}\left (-1+\frac {3 x^{2}}{2}\right )\right )}^{\frac {1}{4}} x^{3} {}_{2}^{}{\moversetsp {}{\mundersetsp {}{F_{1}^{}}}}\left (\frac {1}{4},\frac {3}{2};\frac {5}{2};\frac {3 x^{2}}{2}\right )}{6 \operatorname {signum}\left (-1+\frac {3 x^{2}}{2}\right )^{\frac {1}{4}}}\) | \(42\) |
risch | \(\frac {2 x \left (3 x^{2}-2\right )^{\frac {3}{4}}}{15}+\frac {2 \,2^{\frac {3}{4}} {\left (-\operatorname {signum}\left (-1+\frac {3 x^{2}}{2}\right )\right )}^{\frac {1}{4}} x {}_{2}^{}{\moversetsp {}{\mundersetsp {}{F_{1}^{}}}}\left (\frac {1}{4},\frac {1}{2};\frac {3}{2};\frac {3 x^{2}}{2}\right )}{15 \operatorname {signum}\left (-1+\frac {3 x^{2}}{2}\right )^{\frac {1}{4}}}\) | \(53\) |
1/6*2^(3/4)/signum(-1+3/2*x^2)^(1/4)*(-signum(-1+3/2*x^2))^(1/4)*x^3*hyper geom([1/4,3/2],[5/2],3/2*x^2)
\[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\int { \frac {x^{2}}{{\left (3 \, x^{2} - 2\right )}^{\frac {1}{4}}} \,d x } \]
Result contains complex when optimal does not.
Time = 0.45 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.13 \[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\frac {2^{\frac {3}{4}} x^{3} e^{- \frac {i \pi }{4}} {{}_{2}F_{1}\left (\begin {matrix} \frac {1}{4}, \frac {3}{2} \\ \frac {5}{2} \end {matrix}\middle | {\frac {3 x^{2}}{2}} \right )}}{6} \]
\[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\int { \frac {x^{2}}{{\left (3 \, x^{2} - 2\right )}^{\frac {1}{4}}} \,d x } \]
\[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\int { \frac {x^{2}}{{\left (3 \, x^{2} - 2\right )}^{\frac {1}{4}}} \,d x } \]
Timed out. \[ \int \frac {x^2}{\sqrt [4]{-2+3 x^2}} \, dx=\int \frac {x^2}{{\left (3\,x^2-2\right )}^{1/4}} \,d x \]