Integrand size = 21, antiderivative size = 143 \[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\frac {4 b \sqrt {b x^2+c x^4}}{7 \sqrt {x}}+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}+\frac {4 b^{7/4} x \left (\sqrt {b}+\sqrt {c} x\right ) \sqrt {\frac {b+c x^2}{\left (\sqrt {b}+\sqrt {c} x\right )^2}} \operatorname {EllipticF}\left (2 \arctan \left (\frac {\sqrt [4]{c} \sqrt {x}}{\sqrt [4]{b}}\right ),\frac {1}{2}\right )}{7 \sqrt [4]{c} \sqrt {b x^2+c x^4}} \]
2/7*(c*x^4+b*x^2)^(3/2)/x^(5/2)+4/7*b*(c*x^4+b*x^2)^(1/2)/x^(1/2)+4/7*b^(7 /4)*x*(cos(2*arctan(c^(1/4)*x^(1/2)/b^(1/4)))^2)^(1/2)/cos(2*arctan(c^(1/4 )*x^(1/2)/b^(1/4)))*EllipticF(sin(2*arctan(c^(1/4)*x^(1/2)/b^(1/4))),1/2*2 ^(1/2))*(b^(1/2)+x*c^(1/2))*((c*x^2+b)/(b^(1/2)+x*c^(1/2))^2)^(1/2)/c^(1/4 )/(c*x^4+b*x^2)^(1/2)
Result contains higher order function than in optimal. Order 5 vs. order 4 in optimal.
Time = 8.70 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.39 \[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\frac {2 b \sqrt {x^2 \left (b+c x^2\right )} \operatorname {Hypergeometric2F1}\left (-\frac {3}{2},\frac {1}{4},\frac {5}{4},-\frac {c x^2}{b}\right )}{\sqrt {x} \sqrt {1+\frac {c x^2}{b}}} \]
(2*b*Sqrt[x^2*(b + c*x^2)]*Hypergeometric2F1[-3/2, 1/4, 5/4, -((c*x^2)/b)] )/(Sqrt[x]*Sqrt[1 + (c*x^2)/b])
Time = 0.28 (sec) , antiderivative size = 148, normalized size of antiderivative = 1.03, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.238, Rules used = {1426, 1426, 1431, 266, 761}
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.
\(\displaystyle \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx\) |
\(\Big \downarrow \) 1426 |
\(\displaystyle \frac {6}{7} b \int \frac {\sqrt {c x^4+b x^2}}{x^{3/2}}dx+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}\) |
\(\Big \downarrow \) 1426 |
\(\displaystyle \frac {6}{7} b \left (\frac {2}{3} b \int \frac {\sqrt {x}}{\sqrt {c x^4+b x^2}}dx+\frac {2 \sqrt {b x^2+c x^4}}{3 \sqrt {x}}\right )+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}\) |
\(\Big \downarrow \) 1431 |
\(\displaystyle \frac {6}{7} b \left (\frac {2 b x \sqrt {b+c x^2} \int \frac {1}{\sqrt {x} \sqrt {c x^2+b}}dx}{3 \sqrt {b x^2+c x^4}}+\frac {2 \sqrt {b x^2+c x^4}}{3 \sqrt {x}}\right )+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}\) |
\(\Big \downarrow \) 266 |
\(\displaystyle \frac {6}{7} b \left (\frac {4 b x \sqrt {b+c x^2} \int \frac {1}{\sqrt {c x^2+b}}d\sqrt {x}}{3 \sqrt {b x^2+c x^4}}+\frac {2 \sqrt {b x^2+c x^4}}{3 \sqrt {x}}\right )+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}\) |
\(\Big \downarrow \) 761 |
\(\displaystyle \frac {6}{7} b \left (\frac {2 b^{3/4} x \left (\sqrt {b}+\sqrt {c} x\right ) \sqrt {\frac {b+c x^2}{\left (\sqrt {b}+\sqrt {c} x\right )^2}} \operatorname {EllipticF}\left (2 \arctan \left (\frac {\sqrt [4]{c} \sqrt {x}}{\sqrt [4]{b}}\right ),\frac {1}{2}\right )}{3 \sqrt [4]{c} \sqrt {b x^2+c x^4}}+\frac {2 \sqrt {b x^2+c x^4}}{3 \sqrt {x}}\right )+\frac {2 \left (b x^2+c x^4\right )^{3/2}}{7 x^{5/2}}\) |
(2*(b*x^2 + c*x^4)^(3/2))/(7*x^(5/2)) + (6*b*((2*Sqrt[b*x^2 + c*x^4])/(3*S qrt[x]) + (2*b^(3/4)*x*(Sqrt[b] + Sqrt[c]*x)*Sqrt[(b + c*x^2)/(Sqrt[b] + S qrt[c]*x)^2]*EllipticF[2*ArcTan[(c^(1/4)*Sqrt[x])/b^(1/4)], 1/2])/(3*c^(1/ 4)*Sqrt[b*x^2 + c*x^4])))/7
3.4.69.3.1 Defintions of rubi rules used
Int[((c_.)*(x_))^(m_)*((a_) + (b_.)*(x_)^2)^(p_), x_Symbol] :> With[{k = De nominator[m]}, Simp[k/c Subst[Int[x^(k*(m + 1) - 1)*(a + b*(x^(2*k)/c^2)) ^p, x], x, (c*x)^(1/k)], x]] /; FreeQ[{a, b, c, p}, x] && FractionQ[m] && I ntBinomialQ[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[((d_.)*(x_))^(m_)*((b_.)*(x_)^2 + (c_.)*(x_)^4)^(p_), x_Symbol] :> Simp [(d*x)^(m + 1)*((b*x^2 + c*x^4)^p/(d*(m + 4*p + 1))), x] + Simp[2*b*(p/(d^2 *(m + 4*p + 1))) Int[(d*x)^(m + 2)*(b*x^2 + c*x^4)^(p - 1), x], x] /; Fre eQ[{b, c, d, m, p}, x] && !IntegerQ[p] && GtQ[p, 0] && NeQ[m + 4*p + 1, 0]
Int[((d_.)*(x_))^(m_)*((b_.)*(x_)^2 + (c_.)*(x_)^4)^(p_), x_Symbol] :> Simp [(b*x^2 + c*x^4)^p/((d*x)^(2*p)*(b + c*x^2)^p) Int[(d*x)^(m + 2*p)*(b + c *x^2)^p, x], x] /; FreeQ[{b, c, d, m, p}, x] && !IntegerQ[p]
Time = 0.17 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.01
method | result | size |
default | \(\frac {2 \left (c \,x^{4}+b \,x^{2}\right )^{\frac {3}{2}} \left (2 b^{2} \sqrt {-b c}\, \sqrt {\frac {c x +\sqrt {-b c}}{\sqrt {-b c}}}\, \sqrt {2}\, \sqrt {\frac {-c x +\sqrt {-b c}}{\sqrt {-b c}}}\, \sqrt {-\frac {x c}{\sqrt {-b c}}}\, F\left (\sqrt {\frac {c x +\sqrt {-b c}}{\sqrt {-b c}}}, \frac {\sqrt {2}}{2}\right )+c^{3} x^{5}+4 b \,c^{2} x^{3}+3 b^{2} c x \right )}{7 x^{\frac {7}{2}} \left (c \,x^{2}+b \right )^{2} c}\) | \(145\) |
risch | \(\frac {2 \left (c \,x^{2}+3 b \right ) \sqrt {x^{2} \left (c \,x^{2}+b \right )}}{7 \sqrt {x}}+\frac {4 b^{2} \sqrt {-b c}\, \sqrt {\frac {\left (x +\frac {\sqrt {-b c}}{c}\right ) c}{\sqrt {-b c}}}\, \sqrt {-\frac {2 \left (x -\frac {\sqrt {-b c}}{c}\right ) c}{\sqrt {-b c}}}\, \sqrt {-\frac {x c}{\sqrt {-b c}}}\, F\left (\sqrt {\frac {\left (x +\frac {\sqrt {-b c}}{c}\right ) c}{\sqrt {-b c}}}, \frac {\sqrt {2}}{2}\right ) \sqrt {x^{2} \left (c \,x^{2}+b \right )}\, \sqrt {x \left (c \,x^{2}+b \right )}}{7 c \sqrt {c \,x^{3}+b x}\, x^{\frac {3}{2}} \left (c \,x^{2}+b \right )}\) | \(176\) |
2/7*(c*x^4+b*x^2)^(3/2)/x^(7/2)/(c*x^2+b)^2*(2*b^2*(-b*c)^(1/2)*((c*x+(-b* c)^(1/2))/(-b*c)^(1/2))^(1/2)*2^(1/2)*((-c*x+(-b*c)^(1/2))/(-b*c)^(1/2))^( 1/2)*(-x*c/(-b*c)^(1/2))^(1/2)*EllipticF(((c*x+(-b*c)^(1/2))/(-b*c)^(1/2)) ^(1/2),1/2*2^(1/2))+c^3*x^5+4*b*c^2*x^3+3*b^2*c*x)/c
Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.08 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.39 \[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\frac {2 \, {\left (4 \, b^{2} \sqrt {c} x {\rm weierstrassPInverse}\left (-\frac {4 \, b}{c}, 0, x\right ) + \sqrt {c x^{4} + b x^{2}} {\left (c^{2} x^{2} + 3 \, b c\right )} \sqrt {x}\right )}}{7 \, c x} \]
2/7*(4*b^2*sqrt(c)*x*weierstrassPInverse(-4*b/c, 0, x) + sqrt(c*x^4 + b*x^ 2)*(c^2*x^2 + 3*b*c)*sqrt(x))/(c*x)
\[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\int \frac {\left (x^{2} \left (b + c x^{2}\right )\right )^{\frac {3}{2}}}{x^{\frac {7}{2}}}\, dx \]
\[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\int { \frac {{\left (c x^{4} + b x^{2}\right )}^{\frac {3}{2}}}{x^{\frac {7}{2}}} \,d x } \]
\[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\int { \frac {{\left (c x^{4} + b x^{2}\right )}^{\frac {3}{2}}}{x^{\frac {7}{2}}} \,d x } \]
Timed out. \[ \int \frac {\left (b x^2+c x^4\right )^{3/2}}{x^{7/2}} \, dx=\int \frac {{\left (c\,x^4+b\,x^2\right )}^{3/2}}{x^{7/2}} \,d x \]