Integrand size = 21, antiderivative size = 709 \[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\frac {2}{13} x^5 \sqrt {a+b \left (c x^2\right )^{3/2}}+\frac {6 a c x^7 \sqrt {a+b \left (c x^2\right )^{3/2}}}{91 b \left (c x^2\right )^{5/2}}-\frac {24 a^2 x^5 \sqrt {a+b \left (c x^2\right )^{3/2}}}{91 b^{5/3} \left (c x^2\right )^{5/2} \left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}+\frac {12 \sqrt [4]{3} \sqrt {2-\sqrt {3}} a^{7/3} x^5 \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right ) \sqrt {\frac {a^{2/3}+b^{2/3} c x^2-\sqrt [3]{a} \sqrt [3]{b} \sqrt {c x^2}}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} E\left (\arcsin \left (\frac {\left (1-\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}}{\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}}\right )|-7-4 \sqrt {3}\right )}{91 b^{5/3} \left (c x^2\right )^{5/2} \sqrt {\frac {\sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \sqrt {a+b \left (c x^2\right )^{3/2}}}-\frac {8 \sqrt {2} 3^{3/4} a^{7/3} x^5 \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right ) \sqrt {\frac {a^{2/3}+b^{2/3} c x^2-\sqrt [3]{a} \sqrt [3]{b} \sqrt {c x^2}}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \operatorname {EllipticF}\left (\arcsin \left (\frac {\left (1-\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}}{\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}}\right ),-7-4 \sqrt {3}\right )}{91 b^{5/3} \left (c x^2\right )^{5/2} \sqrt {\frac {\sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \sqrt {a+b \left (c x^2\right )^{3/2}}} \]
2/13*x^5*(a+b*(c*x^2)^(3/2))^(1/2)+6/91*a*c*x^7*(a+b*(c*x^2)^(3/2))^(1/2)/ b/(c*x^2)^(5/2)-24/91*a^2*x^5*(a+b*(c*x^2)^(3/2))^(1/2)/b^(5/3)/(c*x^2)^(5 /2)/(a^(1/3)*(1+3^(1/2))+b^(1/3)*(c*x^2)^(1/2))-8/91*3^(3/4)*a^(7/3)*x^5*E llipticF((a^(1/3)*(1-3^(1/2))+b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+3^(1/2))+ b^(1/3)*(c*x^2)^(1/2)),I*3^(1/2)+2*I)*2^(1/2)*(a^(1/3)+b^(1/3)*(c*x^2)^(1/ 2))*((a^(2/3)+b^(2/3)*c*x^2-a^(1/3)*b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+3^( 1/2))+b^(1/3)*(c*x^2)^(1/2))^2)^(1/2)/b^(5/3)/(c*x^2)^(5/2)/(a+b*(c*x^2)^( 3/2))^(1/2)/(a^(1/3)*(a^(1/3)+b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+3^(1/2))+ b^(1/3)*(c*x^2)^(1/2))^2)^(1/2)+12/91*3^(1/4)*a^(7/3)*x^5*EllipticE((a^(1/ 3)*(1-3^(1/2))+b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+3^(1/2))+b^(1/3)*(c*x^2) ^(1/2)),I*3^(1/2)+2*I)*(a^(1/3)+b^(1/3)*(c*x^2)^(1/2))*(1/2*6^(1/2)-1/2*2^ (1/2))*((a^(2/3)+b^(2/3)*c*x^2-a^(1/3)*b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+ 3^(1/2))+b^(1/3)*(c*x^2)^(1/2))^2)^(1/2)/b^(5/3)/(c*x^2)^(5/2)/(a+b*(c*x^2 )^(3/2))^(1/2)/(a^(1/3)*(a^(1/3)+b^(1/3)*(c*x^2)^(1/2))/(a^(1/3)*(1+3^(1/2 ))+b^(1/3)*(c*x^2)^(1/2))^2)^(1/2)
Result contains higher order function than in optimal. Order 5 vs. order 4 in optimal.
Time = 2.23 (sec) , antiderivative size = 109, normalized size of antiderivative = 0.15 \[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\frac {2 x^5 \sqrt {a+b \left (c x^2\right )^{3/2}} \left (a \left (\frac {a+b \left (c x^2\right )^{3/2}}{a}\right )^{3/2}-a \operatorname {Hypergeometric2F1}\left (-\frac {1}{2},\frac {2}{3},\frac {5}{3},-\frac {b \left (c x^2\right )^{3/2}}{a}\right )\right )}{13 b \left (c x^2\right )^{3/2} \sqrt {\frac {a+b \left (c x^2\right )^{3/2}}{a}}} \]
(2*x^5*Sqrt[a + b*(c*x^2)^(3/2)]*(a*((a + b*(c*x^2)^(3/2))/a)^(3/2) - a*Hy pergeometric2F1[-1/2, 2/3, 5/3, -((b*(c*x^2)^(3/2))/a)]))/(13*b*(c*x^2)^(3 /2)*Sqrt[(a + b*(c*x^2)^(3/2))/a])
Time = 0.55 (sec) , antiderivative size = 710, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.286, Rules used = {892, 811, 843, 832, 759, 2416}
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.
\(\displaystyle \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx\) |
\(\Big \downarrow \) 892 |
\(\displaystyle \frac {x^5 \int c^2 x^4 \sqrt {b \left (c x^2\right )^{3/2}+a}d\sqrt {c x^2}}{\left (c x^2\right )^{5/2}}\) |
\(\Big \downarrow \) 811 |
\(\displaystyle \frac {x^5 \left (\frac {3}{13} a \int \frac {c^2 x^4}{\sqrt {b \left (c x^2\right )^{3/2}+a}}d\sqrt {c x^2}+\frac {2}{13} \left (c x^2\right )^{5/2} \sqrt {a+b \left (c x^2\right )^{3/2}}\right )}{\left (c x^2\right )^{5/2}}\) |
\(\Big \downarrow \) 843 |
\(\displaystyle \frac {x^5 \left (\frac {3}{13} a \left (\frac {2 c x^2 \sqrt {a+b \left (c x^2\right )^{3/2}}}{7 b}-\frac {4 a \int \frac {\sqrt {c x^2}}{\sqrt {b \left (c x^2\right )^{3/2}+a}}d\sqrt {c x^2}}{7 b}\right )+\frac {2}{13} \left (c x^2\right )^{5/2} \sqrt {a+b \left (c x^2\right )^{3/2}}\right )}{\left (c x^2\right )^{5/2}}\) |
\(\Big \downarrow \) 832 |
\(\displaystyle \frac {x^5 \left (\frac {3}{13} a \left (\frac {2 c x^2 \sqrt {a+b \left (c x^2\right )^{3/2}}}{7 b}-\frac {4 a \left (\frac {\int \frac {\sqrt [3]{b} \sqrt {c x^2}+\left (1-\sqrt {3}\right ) \sqrt [3]{a}}{\sqrt {b \left (c x^2\right )^{3/2}+a}}d\sqrt {c x^2}}{\sqrt [3]{b}}-\frac {\left (1-\sqrt {3}\right ) \sqrt [3]{a} \int \frac {1}{\sqrt {b \left (c x^2\right )^{3/2}+a}}d\sqrt {c x^2}}{\sqrt [3]{b}}\right )}{7 b}\right )+\frac {2}{13} \left (c x^2\right )^{5/2} \sqrt {a+b \left (c x^2\right )^{3/2}}\right )}{\left (c x^2\right )^{5/2}}\) |
\(\Big \downarrow \) 759 |
\(\displaystyle \frac {x^5 \left (\frac {3}{13} a \left (\frac {2 c x^2 \sqrt {a+b \left (c x^2\right )^{3/2}}}{7 b}-\frac {4 a \left (\frac {\int \frac {\sqrt [3]{b} \sqrt {c x^2}+\left (1-\sqrt {3}\right ) \sqrt [3]{a}}{\sqrt {b \left (c x^2\right )^{3/2}+a}}d\sqrt {c x^2}}{\sqrt [3]{b}}-\frac {2 \left (1-\sqrt {3}\right ) \sqrt {2+\sqrt {3}} \sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right ) \sqrt {\frac {a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} \sqrt {c x^2}+b^{2/3} c x^2}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \operatorname {EllipticF}\left (\arcsin \left (\frac {\sqrt [3]{b} \sqrt {c x^2}+\left (1-\sqrt {3}\right ) \sqrt [3]{a}}{\sqrt [3]{b} \sqrt {c x^2}+\left (1+\sqrt {3}\right ) \sqrt [3]{a}}\right ),-7-4 \sqrt {3}\right )}{\sqrt [4]{3} b^{2/3} \sqrt {\frac {\sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \sqrt {a+b \left (c x^2\right )^{3/2}}}\right )}{7 b}\right )+\frac {2}{13} \left (c x^2\right )^{5/2} \sqrt {a+b \left (c x^2\right )^{3/2}}\right )}{\left (c x^2\right )^{5/2}}\) |
\(\Big \downarrow \) 2416 |
\(\displaystyle \frac {x^5 \left (\frac {3}{13} a \left (\frac {2 c x^2 \sqrt {a+b \left (c x^2\right )^{3/2}}}{7 b}-\frac {4 a \left (\frac {\frac {2 \sqrt {a+b \left (c x^2\right )^{3/2}}}{\sqrt [3]{b} \left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}-\frac {\sqrt [4]{3} \sqrt {2-\sqrt {3}} \sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right ) \sqrt {\frac {a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} \sqrt {c x^2}+b^{2/3} c x^2}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} E\left (\arcsin \left (\frac {\sqrt [3]{b} \sqrt {c x^2}+\left (1-\sqrt {3}\right ) \sqrt [3]{a}}{\sqrt [3]{b} \sqrt {c x^2}+\left (1+\sqrt {3}\right ) \sqrt [3]{a}}\right )|-7-4 \sqrt {3}\right )}{\sqrt [3]{b} \sqrt {\frac {\sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \sqrt {a+b \left (c x^2\right )^{3/2}}}}{\sqrt [3]{b}}-\frac {2 \left (1-\sqrt {3}\right ) \sqrt {2+\sqrt {3}} \sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right ) \sqrt {\frac {a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} \sqrt {c x^2}+b^{2/3} c x^2}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \operatorname {EllipticF}\left (\arcsin \left (\frac {\sqrt [3]{b} \sqrt {c x^2}+\left (1-\sqrt {3}\right ) \sqrt [3]{a}}{\sqrt [3]{b} \sqrt {c x^2}+\left (1+\sqrt {3}\right ) \sqrt [3]{a}}\right ),-7-4 \sqrt {3}\right )}{\sqrt [4]{3} b^{2/3} \sqrt {\frac {\sqrt [3]{a} \left (\sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )}{\left (\left (1+\sqrt {3}\right ) \sqrt [3]{a}+\sqrt [3]{b} \sqrt {c x^2}\right )^2}} \sqrt {a+b \left (c x^2\right )^{3/2}}}\right )}{7 b}\right )+\frac {2}{13} \left (c x^2\right )^{5/2} \sqrt {a+b \left (c x^2\right )^{3/2}}\right )}{\left (c x^2\right )^{5/2}}\) |
(x^5*((2*(c*x^2)^(5/2)*Sqrt[a + b*(c*x^2)^(3/2)])/13 + (3*a*((2*c*x^2*Sqrt [a + b*(c*x^2)^(3/2)])/(7*b) - (4*a*(((2*Sqrt[a + b*(c*x^2)^(3/2)])/(b^(1/ 3)*((1 + Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[c*x^2])) - (3^(1/4)*Sqrt[2 - Sqrt [3]]*a^(1/3)*(a^(1/3) + b^(1/3)*Sqrt[c*x^2])*Sqrt[(a^(2/3) + b^(2/3)*c*x^2 - a^(1/3)*b^(1/3)*Sqrt[c*x^2])/((1 + Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[c*x^ 2])^2]*EllipticE[ArcSin[((1 - Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[c*x^2])/((1 + Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[c*x^2])], -7 - 4*Sqrt[3]])/(b^(1/3)*Sqrt [(a^(1/3)*(a^(1/3) + b^(1/3)*Sqrt[c*x^2]))/((1 + Sqrt[3])*a^(1/3) + b^(1/3 )*Sqrt[c*x^2])^2]*Sqrt[a + b*(c*x^2)^(3/2)]))/b^(1/3) - (2*(1 - Sqrt[3])*S qrt[2 + Sqrt[3]]*a^(1/3)*(a^(1/3) + b^(1/3)*Sqrt[c*x^2])*Sqrt[(a^(2/3) + b ^(2/3)*c*x^2 - a^(1/3)*b^(1/3)*Sqrt[c*x^2])/((1 + Sqrt[3])*a^(1/3) + b^(1/ 3)*Sqrt[c*x^2])^2]*EllipticF[ArcSin[((1 - Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[ c*x^2])/((1 + Sqrt[3])*a^(1/3) + b^(1/3)*Sqrt[c*x^2])], -7 - 4*Sqrt[3]])/( 3^(1/4)*b^(2/3)*Sqrt[(a^(1/3)*(a^(1/3) + b^(1/3)*Sqrt[c*x^2]))/((1 + Sqrt[ 3])*a^(1/3) + b^(1/3)*Sqrt[c*x^2])^2]*Sqrt[a + b*(c*x^2)^(3/2)])))/(7*b))) /13))/(c*x^2)^(5/2)
3.30.51.3.1 Defintions of rubi rules used
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] & & PosQ[a]
Int[((c_.)*(x_))^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[(c* x)^(m + 1)*((a + b*x^n)^p/(c*(m + n*p + 1))), x] + Simp[a*n*(p/(m + n*p + 1 )) Int[(c*x)^m*(a + b*x^n)^(p - 1), x], x] /; FreeQ[{a, b, c, m}, x] && I GtQ[n, 0] && GtQ[p, 0] && NeQ[m + n*p + 1, 0] && IntBinomialQ[a, b, c, n, m , p, x]
Int[(x_)/Sqrt[(a_) + (b_.)*(x_)^3], x_Symbol] :> With[{r = Numer[Rt[b/a, 3] ], s = Denom[Rt[b/a, 3]]}, Simp[(-(1 - Sqrt[3]))*(s/r) Int[1/Sqrt[a + b*x ^3], x], x] + Simp[1/r Int[((1 - Sqrt[3])*s + r*x)/Sqrt[a + b*x^3], x], x ]] /; FreeQ[{a, b}, x] && PosQ[a]
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[((d_.)*(x_))^(m_.)*((a_) + (b_.)*((c_.)*(x_)^(q_))^(n_))^(p_.), x_Symbo l] :> Simp[(d*x)^(m + 1)/(d*((c*x^q)^(1/q))^(m + 1)) Subst[Int[x^m*(a + b *x^(n*q))^p, x], x, (c*x^q)^(1/q)], x] /; FreeQ[{a, b, c, d, m, n, p, q}, x ] && IntegerQ[n*q] && NeQ[x, (c*x^q)^(1/q)]
Int[((c_) + (d_.)*(x_))/Sqrt[(a_) + (b_.)*(x_)^3], x_Symbol] :> With[{r = N umer[Simplify[(1 - Sqrt[3])*(d/c)]], s = Denom[Simplify[(1 - Sqrt[3])*(d/c) ]]}, Simp[2*d*s^3*(Sqrt[a + b*x^3]/(a*r^2*((1 + Sqrt[3])*s + r*x))), x] - S imp[3^(1/4)*Sqrt[2 - Sqrt[3]]*d*s*(s + r*x)*(Sqrt[(s^2 - r*s*x + r^2*x^2)/( (1 + Sqrt[3])*s + r*x)^2]/(r^2*Sqrt[a + b*x^3]*Sqrt[s*((s + r*x)/((1 + Sqrt [3])*s + r*x)^2)]))*EllipticE[ArcSin[((1 - Sqrt[3])*s + r*x)/((1 + Sqrt[3]) *s + r*x)], -7 - 4*Sqrt[3]], x]] /; FreeQ[{a, b, c, d}, x] && PosQ[a] && Eq Q[b*c^3 - 2*(5 - 3*Sqrt[3])*a*d^3, 0]
\[\int x^{4} \sqrt {a +b \left (c \,x^{2}\right )^{\frac {3}{2}}}d x\]
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.13 (sec) , antiderivative size = 115, normalized size of antiderivative = 0.16 \[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\frac {2 \, {\left (12 \, \sqrt {\frac {\sqrt {c x^{2}} b c}{x}} a^{2} {\rm weierstrassZeta}\left (0, -\frac {4 \, \sqrt {c x^{2}} a}{b c^{2} x}, {\rm weierstrassPInverse}\left (0, -\frac {4 \, \sqrt {c x^{2}} a}{b c^{2} x}, x\right )\right ) + {\left (7 \, b^{2} c^{3} x^{5} + 3 \, \sqrt {c x^{2}} a b c x\right )} \sqrt {\sqrt {c x^{2}} b c x^{2} + a}\right )}}{91 \, b^{2} c^{3}} \]
2/91*(12*sqrt(sqrt(c*x^2)*b*c/x)*a^2*weierstrassZeta(0, -4*sqrt(c*x^2)*a/( b*c^2*x), weierstrassPInverse(0, -4*sqrt(c*x^2)*a/(b*c^2*x), x)) + (7*b^2* c^3*x^5 + 3*sqrt(c*x^2)*a*b*c*x)*sqrt(sqrt(c*x^2)*b*c*x^2 + a))/(b^2*c^3)
\[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\int x^{4} \sqrt {a + b \left (c x^{2}\right )^{\frac {3}{2}}}\, dx \]
\[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\int { \sqrt {\left (c x^{2}\right )^{\frac {3}{2}} b + a} x^{4} \,d x } \]
\[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\int { \sqrt {\left (c x^{2}\right )^{\frac {3}{2}} b + a} x^{4} \,d x } \]
Timed out. \[ \int x^4 \sqrt {a+b \left (c x^2\right )^{3/2}} \, dx=\int x^4\,\sqrt {a+b\,{\left (c\,x^2\right )}^{3/2}} \,d x \]