Integrand size = 21, antiderivative size = 56 \[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\frac {2^{\frac {3}{2}+p} (1+a x)^{\frac {1}{2}+p} \operatorname {Hypergeometric2F1}\left (-\frac {1}{2}-p,\frac {1}{2}+p,\frac {3}{2}+p,\frac {1}{2} (1+a x)\right )}{a (1+2 p)} \] Output:
2^(3/2+p)*(a*x+1)^(1/2+p)*hypergeom([-1/2-p, 1/2+p],[3/2+p],1/2*a*x+1/2)/a /(1+2*p)
Time = 0.03 (sec) , antiderivative size = 56, normalized size of antiderivative = 1.00 \[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\frac {(2-2 a x)^{\frac {1}{2}+p} (-1+a x) \operatorname {Hypergeometric2F1}\left (\frac {1}{2}-p,\frac {3}{2}+p,\frac {5}{2}+p,\frac {1}{2} (1-a x)\right )}{a (3+2 p)} \] Input:
Integrate[(1 - a^2*x^2)^p/E^ArcTanh[a*x],x]
Output:
((2 - 2*a*x)^(1/2 + p)*(-1 + a*x)*Hypergeometric2F1[1/2 - p, 3/2 + p, 5/2 + p, (1 - a*x)/2])/(a*(3 + 2*p))
Time = 0.39 (sec) , antiderivative size = 59, normalized size of antiderivative = 1.05, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.095, Rules used = {6690, 79}
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.
\(\displaystyle \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx\) |
\(\Big \downarrow \) 6690 |
\(\displaystyle \int (1-a x)^{p+\frac {1}{2}} (a x+1)^{p-\frac {1}{2}}dx\) |
\(\Big \downarrow \) 79 |
\(\displaystyle -\frac {2^{p+\frac {1}{2}} (1-a x)^{p+\frac {3}{2}} \operatorname {Hypergeometric2F1}\left (\frac {1}{2}-p,p+\frac {3}{2},p+\frac {5}{2},\frac {1}{2} (1-a x)\right )}{a (2 p+3)}\) |
Input:
Int[(1 - a^2*x^2)^p/E^ArcTanh[a*x],x]
Output:
-((2^(1/2 + p)*(1 - a*x)^(3/2 + p)*Hypergeometric2F1[1/2 - p, 3/2 + p, 5/2 + p, (1 - a*x)/2])/(a*(3 + 2*p)))
Int[((a_) + (b_.)*(x_))^(m_)*((c_) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[(( a + b*x)^(m + 1)/(b*(m + 1)*(b/(b*c - a*d))^n))*Hypergeometric2F1[-n, m + 1 , m + 2, (-d)*((a + b*x)/(b*c - a*d))], x] /; FreeQ[{a, b, c, d, m, n}, x] && !IntegerQ[m] && !IntegerQ[n] && GtQ[b/(b*c - a*d), 0] && (RationalQ[m] || !(RationalQ[n] && GtQ[-d/(b*c - a*d), 0]))
Int[E^(ArcTanh[(a_.)*(x_)]*(n_.))*((c_) + (d_.)*(x_)^2)^(p_.), x_Symbol] :> Simp[c^p Int[(1 - a*x)^(p - n/2)*(1 + a*x)^(p + n/2), x], x] /; FreeQ[{a , c, d, n, p}, x] && EqQ[a^2*c + d, 0] && (IntegerQ[p] || GtQ[c, 0])
\[\int \frac {\left (-a^{2} x^{2}+1\right )^{p} \sqrt {-a^{2} x^{2}+1}}{a x +1}d x\]
Input:
int((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x)
Output:
int((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x)
\[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int { \frac {\sqrt {-a^{2} x^{2} + 1} {\left (-a^{2} x^{2} + 1\right )}^{p}}{a x + 1} \,d x } \] Input:
integrate((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x, algorithm="fricas")
Output:
integral(sqrt(-a^2*x^2 + 1)*(-a^2*x^2 + 1)^p/(a*x + 1), x)
\[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int \frac {\sqrt {- \left (a x - 1\right ) \left (a x + 1\right )} \left (- \left (a x - 1\right ) \left (a x + 1\right )\right )^{p}}{a x + 1}\, dx \] Input:
integrate((-a**2*x**2+1)**p/(a*x+1)*(-a**2*x**2+1)**(1/2),x)
Output:
Integral(sqrt(-(a*x - 1)*(a*x + 1))*(-(a*x - 1)*(a*x + 1))**p/(a*x + 1), x )
\[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int { \frac {\sqrt {-a^{2} x^{2} + 1} {\left (-a^{2} x^{2} + 1\right )}^{p}}{a x + 1} \,d x } \] Input:
integrate((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x, algorithm="maxima")
Output:
integrate((-a^2*x^2 + 1)^(p + 1/2)/(a*x + 1), x)
\[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int { \frac {\sqrt {-a^{2} x^{2} + 1} {\left (-a^{2} x^{2} + 1\right )}^{p}}{a x + 1} \,d x } \] Input:
integrate((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x, algorithm="giac")
Output:
integrate(sqrt(-a^2*x^2 + 1)*(-a^2*x^2 + 1)^p/(a*x + 1), x)
Timed out. \[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int \frac {{\left (1-a^2\,x^2\right )}^p\,\sqrt {1-a^2\,x^2}}{a\,x+1} \,d x \] Input:
int(((1 - a^2*x^2)^p*(1 - a^2*x^2)^(1/2))/(a*x + 1),x)
Output:
int(((1 - a^2*x^2)^p*(1 - a^2*x^2)^(1/2))/(a*x + 1), x)
\[ \int e^{-\text {arctanh}(a x)} \left (1-a^2 x^2\right )^p \, dx=\int \frac {\left (-a^{2} x^{2}+1\right )^{p +\frac {1}{2}}}{a x +1}d x \] Input:
int((-a^2*x^2+1)^p/(a*x+1)*(-a^2*x^2+1)^(1/2),x)
Output:
int(( - a**2*x**2 + 1)**((2*p + 1)/2)/(a*x + 1),x)