Integrand size = 27, antiderivative size = 152 \[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\frac {4 \sqrt {c-\frac {c}{a^2 x^2}} x^2}{a \sqrt {1-a^2 x^2}}-\frac {3 \sqrt {c-\frac {c}{a^2 x^2}} x^3}{2 \sqrt {1-a^2 x^2}}+\frac {a \sqrt {c-\frac {c}{a^2 x^2}} x^4}{3 \sqrt {1-a^2 x^2}}-\frac {4 \sqrt {c-\frac {c}{a^2 x^2}} x \log (1+a x)}{a^2 \sqrt {1-a^2 x^2}} \]
4*x^2*(c-c/a^2/x^2)^(1/2)/a/(-a^2*x^2+1)^(1/2)-3/2*x^3*(c-c/a^2/x^2)^(1/2) /(-a^2*x^2+1)^(1/2)+1/3*a*x^4*(c-c/a^2/x^2)^(1/2)/(-a^2*x^2+1)^(1/2)-4*x*l n(a*x+1)*(c-c/a^2/x^2)^(1/2)/a^2/(-a^2*x^2+1)^(1/2)
Time = 0.04 (sec) , antiderivative size = 64, normalized size of antiderivative = 0.42 \[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\frac {\sqrt {c-\frac {c}{a^2 x^2}} x \left (\frac {4 x}{a}-\frac {3 x^2}{2}+\frac {a x^3}{3}-\frac {4 \log (1+a x)}{a^2}\right )}{\sqrt {1-a^2 x^2}} \]
(Sqrt[c - c/(a^2*x^2)]*x*((4*x)/a - (3*x^2)/2 + (a*x^3)/3 - (4*Log[1 + a*x ])/a^2))/Sqrt[1 - a^2*x^2]
Time = 0.50 (sec) , antiderivative size = 64, normalized size of antiderivative = 0.42, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.148, Rules used = {6710, 6700, 86, 2009}
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.
\(\displaystyle \int x^2 e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} \, dx\) |
\(\Big \downarrow \) 6710 |
\(\displaystyle \frac {x \sqrt {c-\frac {c}{a^2 x^2}} \int e^{-3 \text {arctanh}(a x)} x \sqrt {1-a^2 x^2}dx}{\sqrt {1-a^2 x^2}}\) |
\(\Big \downarrow \) 6700 |
\(\displaystyle \frac {x \sqrt {c-\frac {c}{a^2 x^2}} \int \frac {x (1-a x)^2}{a x+1}dx}{\sqrt {1-a^2 x^2}}\) |
\(\Big \downarrow \) 86 |
\(\displaystyle \frac {x \sqrt {c-\frac {c}{a^2 x^2}} \int \left (a x^2-3 x+\frac {4}{a}-\frac {4}{a (a x+1)}\right )dx}{\sqrt {1-a^2 x^2}}\) |
\(\Big \downarrow \) 2009 |
\(\displaystyle \frac {x \sqrt {c-\frac {c}{a^2 x^2}} \left (-\frac {4 \log (a x+1)}{a^2}+\frac {a x^3}{3}+\frac {4 x}{a}-\frac {3 x^2}{2}\right )}{\sqrt {1-a^2 x^2}}\) |
(Sqrt[c - c/(a^2*x^2)]*x*((4*x)/a - (3*x^2)/2 + (a*x^3)/3 - (4*Log[1 + a*x ])/a^2))/Sqrt[1 - a^2*x^2]
3.8.81.3.1 Defintions of rubi rules used
Int[((a_.) + (b_.)*(x_))*((c_) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_ .), x_] :> Int[ExpandIntegrand[(a + b*x)*(c + d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, c, d, e, f, n}, x] && ((ILtQ[n, 0] && ILtQ[p, 0]) || EqQ[p, 1 ] || (IGtQ[p, 0] && ( !IntegerQ[n] || LeQ[9*p + 5*(n + 2), 0] || GeQ[n + p + 1, 0] || (GeQ[n + p + 2, 0] && RationalQ[a, b, c, d, e, f]))))
Int[E^(ArcTanh[(a_.)*(x_)]*(n_.))*(x_)^(m_.)*((c_) + (d_.)*(x_)^2)^(p_.), x _Symbol] :> Simp[c^p Int[x^m*(1 - a*x)^(p - n/2)*(1 + a*x)^(p + n/2), x], x] /; FreeQ[{a, c, d, m, n, p}, x] && EqQ[a^2*c + d, 0] && (IntegerQ[p] || GtQ[c, 0])
Int[E^(ArcTanh[(a_.)*(x_)]*(n_.))*(u_.)*((c_) + (d_.)/(x_)^2)^(p_), x_Symbo l] :> Simp[x^(2*p)*((c + d/x^2)^p/(1 - a^2*x^2)^p) Int[(u/x^(2*p))*(1 - a ^2*x^2)^p*E^(n*ArcTanh[a*x]), x], x] /; FreeQ[{a, c, d, n, p}, x] && EqQ[c + a^2*d, 0] && !IntegerQ[p] && !IntegerQ[n/2]
Time = 0.15 (sec) , antiderivative size = 78, normalized size of antiderivative = 0.51
method | result | size |
default | \(\frac {\sqrt {\frac {c \left (a^{2} x^{2}-1\right )}{a^{2} x^{2}}}\, x \sqrt {-a^{2} x^{2}+1}\, \left (-2 a^{3} x^{3}+9 a^{2} x^{2}-24 a x +24 \ln \left (a x +1\right )\right )}{6 \left (a^{2} x^{2}-1\right ) a^{2}}\) | \(78\) |
1/6*(c*(a^2*x^2-1)/a^2/x^2)^(1/2)*x*(-a^2*x^2+1)^(1/2)*(-2*a^3*x^3+9*a^2*x ^2-24*a*x+24*ln(a*x+1))/(a^2*x^2-1)/a^2
Time = 0.29 (sec) , antiderivative size = 407, normalized size of antiderivative = 2.68 \[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\left [\frac {12 \, {\left (a^{2} x^{2} - 1\right )} \sqrt {-c} \log \left (\frac {a^{6} c x^{6} + 4 \, a^{5} c x^{5} + 5 \, a^{4} c x^{4} - 4 \, a^{2} c x^{2} - 4 \, a c x - {\left (a^{5} x^{5} + 4 \, a^{4} x^{4} + 6 \, a^{3} x^{3} + 4 \, a^{2} x^{2}\right )} \sqrt {-a^{2} x^{2} + 1} \sqrt {-c} \sqrt {\frac {a^{2} c x^{2} - c}{a^{2} x^{2}}} - 2 \, c}{a^{4} x^{4} + 2 \, a^{3} x^{3} - 2 \, a x - 1}\right ) - {\left (2 \, a^{4} x^{4} - 9 \, a^{3} x^{3} + 24 \, a^{2} x^{2}\right )} \sqrt {-a^{2} x^{2} + 1} \sqrt {\frac {a^{2} c x^{2} - c}{a^{2} x^{2}}}}{6 \, {\left (a^{5} x^{2} - a^{3}\right )}}, \frac {24 \, {\left (a^{2} x^{2} - 1\right )} \sqrt {c} \arctan \left (\frac {{\left (a^{2} x^{2} + 2 \, a x + 2\right )} \sqrt {-a^{2} x^{2} + 1} \sqrt {c} \sqrt {\frac {a^{2} c x^{2} - c}{a^{2} x^{2}}}}{a^{3} c x^{3} + 2 \, a^{2} c x^{2} - a c x - 2 \, c}\right ) - {\left (2 \, a^{4} x^{4} - 9 \, a^{3} x^{3} + 24 \, a^{2} x^{2}\right )} \sqrt {-a^{2} x^{2} + 1} \sqrt {\frac {a^{2} c x^{2} - c}{a^{2} x^{2}}}}{6 \, {\left (a^{5} x^{2} - a^{3}\right )}}\right ] \]
[1/6*(12*(a^2*x^2 - 1)*sqrt(-c)*log((a^6*c*x^6 + 4*a^5*c*x^5 + 5*a^4*c*x^4 - 4*a^2*c*x^2 - 4*a*c*x - (a^5*x^5 + 4*a^4*x^4 + 6*a^3*x^3 + 4*a^2*x^2)*s qrt(-a^2*x^2 + 1)*sqrt(-c)*sqrt((a^2*c*x^2 - c)/(a^2*x^2)) - 2*c)/(a^4*x^4 + 2*a^3*x^3 - 2*a*x - 1)) - (2*a^4*x^4 - 9*a^3*x^3 + 24*a^2*x^2)*sqrt(-a^ 2*x^2 + 1)*sqrt((a^2*c*x^2 - c)/(a^2*x^2)))/(a^5*x^2 - a^3), 1/6*(24*(a^2* x^2 - 1)*sqrt(c)*arctan((a^2*x^2 + 2*a*x + 2)*sqrt(-a^2*x^2 + 1)*sqrt(c)*s qrt((a^2*c*x^2 - c)/(a^2*x^2))/(a^3*c*x^3 + 2*a^2*c*x^2 - a*c*x - 2*c)) - (2*a^4*x^4 - 9*a^3*x^3 + 24*a^2*x^2)*sqrt(-a^2*x^2 + 1)*sqrt((a^2*c*x^2 - c)/(a^2*x^2)))/(a^5*x^2 - a^3)]
\[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\int \frac {x^{2} \left (- \left (a x - 1\right ) \left (a x + 1\right )\right )^{\frac {3}{2}} \sqrt {- c \left (-1 + \frac {1}{a x}\right ) \left (1 + \frac {1}{a x}\right )}}{\left (a x + 1\right )^{3}}\, dx \]
Integral(x**2*(-(a*x - 1)*(a*x + 1))**(3/2)*sqrt(-c*(-1 + 1/(a*x))*(1 + 1/ (a*x)))/(a*x + 1)**3, x)
\[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\int { \frac {{\left (-a^{2} x^{2} + 1\right )}^{\frac {3}{2}} \sqrt {c - \frac {c}{a^{2} x^{2}}} x^{2}}{{\left (a x + 1\right )}^{3}} \,d x } \]
\[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\int { \frac {{\left (-a^{2} x^{2} + 1\right )}^{\frac {3}{2}} \sqrt {c - \frac {c}{a^{2} x^{2}}} x^{2}}{{\left (a x + 1\right )}^{3}} \,d x } \]
Timed out. \[ \int e^{-3 \text {arctanh}(a x)} \sqrt {c-\frac {c}{a^2 x^2}} x^2 \, dx=\int \frac {x^2\,\sqrt {c-\frac {c}{a^2\,x^2}}\,{\left (1-a^2\,x^2\right )}^{3/2}}{{\left (a\,x+1\right )}^3} \,d x \]