3.104 \(\int \frac{x^3}{\cosh ^{-1}(a x)^{5/2}} \, dx\)

Optimal. Leaf size=172 \[ -\frac{2 \sqrt{\pi } \text{Erf}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}-\frac{\sqrt{2 \pi } \text{Erf}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{2 \sqrt{\pi } \text{Erfi}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{\sqrt{2 \pi } \text{Erfi}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{2 x^3 \sqrt{a x-1} \sqrt{a x+1}}{3 a \cosh ^{-1}(a x)^{3/2}} \]

[Out]

(-2*x^3*Sqrt[-1 + a*x]*Sqrt[1 + a*x])/(3*a*ArcCosh[a*x]^(3/2)) + (4*x^2)/(a^2*Sqrt[ArcCosh[a*x]]) - (16*x^4)/(
3*Sqrt[ArcCosh[a*x]]) - (2*Sqrt[Pi]*Erf[2*Sqrt[ArcCosh[a*x]]])/(3*a^4) - (Sqrt[2*Pi]*Erf[Sqrt[2]*Sqrt[ArcCosh[
a*x]]])/(3*a^4) + (2*Sqrt[Pi]*Erfi[2*Sqrt[ArcCosh[a*x]]])/(3*a^4) + (Sqrt[2*Pi]*Erfi[Sqrt[2]*Sqrt[ArcCosh[a*x]
]])/(3*a^4)

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Rubi [A]  time = 0.755236, antiderivative size = 172, normalized size of antiderivative = 1., number of steps used = 24, number of rules used = 9, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.75, Rules used = {5668, 5775, 5670, 5448, 3308, 2180, 2204, 2205, 12} \[ -\frac{2 \sqrt{\pi } \text{Erf}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}-\frac{\sqrt{2 \pi } \text{Erf}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{2 \sqrt{\pi } \text{Erfi}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{\sqrt{2 \pi } \text{Erfi}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{2 x^3 \sqrt{a x-1} \sqrt{a x+1}}{3 a \cosh ^{-1}(a x)^{3/2}} \]

Antiderivative was successfully verified.

[In]

Int[x^3/ArcCosh[a*x]^(5/2),x]

[Out]

(-2*x^3*Sqrt[-1 + a*x]*Sqrt[1 + a*x])/(3*a*ArcCosh[a*x]^(3/2)) + (4*x^2)/(a^2*Sqrt[ArcCosh[a*x]]) - (16*x^4)/(
3*Sqrt[ArcCosh[a*x]]) - (2*Sqrt[Pi]*Erf[2*Sqrt[ArcCosh[a*x]]])/(3*a^4) - (Sqrt[2*Pi]*Erf[Sqrt[2]*Sqrt[ArcCosh[
a*x]]])/(3*a^4) + (2*Sqrt[Pi]*Erfi[2*Sqrt[ArcCosh[a*x]]])/(3*a^4) + (Sqrt[2*Pi]*Erfi[Sqrt[2]*Sqrt[ArcCosh[a*x]
]])/(3*a^4)

Rule 5668

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_)*(x_)^(m_.), x_Symbol] :> Simp[(x^m*Sqrt[-1 + c*x]*Sqrt[1 + c*x]*(
a + b*ArcCosh[c*x])^(n + 1))/(b*c*(n + 1)), x] + (-Dist[(c*(m + 1))/(b*(n + 1)), Int[(x^(m + 1)*(a + b*ArcCosh
[c*x])^(n + 1))/(Sqrt[-1 + c*x]*Sqrt[1 + c*x]), x], x] + Dist[m/(b*c*(n + 1)), Int[(x^(m - 1)*(a + b*ArcCosh[c
*x])^(n + 1))/(Sqrt[-1 + c*x]*Sqrt[1 + c*x]), x], x]) /; FreeQ[{a, b, c}, x] && IGtQ[m, 0] && LtQ[n, -2]

Rule 5775

Int[(((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_)*((f_.)*(x_))^(m_.))/(Sqrt[(d1_) + (e1_.)*(x_)]*Sqrt[(d2_) + (e2_
.)*(x_)]), x_Symbol] :> Simp[((f*x)^m*(a + b*ArcCosh[c*x])^(n + 1))/(b*c*Sqrt[-(d1*d2)]*(n + 1)), x] - Dist[(f
*m)/(b*c*Sqrt[-(d1*d2)]*(n + 1)), Int[(f*x)^(m - 1)*(a + b*ArcCosh[c*x])^(n + 1), x], x] /; FreeQ[{a, b, c, d1
, e1, d2, e2, f, m}, x] && EqQ[e1 - c*d1, 0] && EqQ[e2 + c*d2, 0] && LtQ[n, -1] && GtQ[d1, 0] && LtQ[d2, 0]

Rule 5670

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_)*(x_)^(m_.), x_Symbol] :> Dist[1/c^(m + 1), Subst[Int[(a + b*x)^n*
Cosh[x]^m*Sinh[x], x], x, ArcCosh[c*x]], x] /; FreeQ[{a, b, c, n}, x] && IGtQ[m, 0]

Rule 5448

Int[Cosh[(a_.) + (b_.)*(x_)]^(p_.)*((c_.) + (d_.)*(x_))^(m_.)*Sinh[(a_.) + (b_.)*(x_)]^(n_.), x_Symbol] :> Int
[ExpandTrigReduce[(c + d*x)^m, Sinh[a + b*x]^n*Cosh[a + b*x]^p, x], x] /; FreeQ[{a, b, c, d, m}, x] && IGtQ[n,
0] && IGtQ[p, 0]

Rule 3308

Int[((c_.) + (d_.)*(x_))^(m_.)*sin[(e_.) + (f_.)*(x_)], x_Symbol] :> Dist[I/2, Int[(c + d*x)^m/E^(I*(e + f*x))
, x], x] - Dist[I/2, Int[(c + d*x)^m*E^(I*(e + f*x)), x], x] /; FreeQ[{c, d, e, f, m}, x]

Rule 2180

Int[(F_)^((g_.)*((e_.) + (f_.)*(x_)))/Sqrt[(c_.) + (d_.)*(x_)], x_Symbol] :> Dist[2/d, Subst[Int[F^(g*(e - (c*
f)/d) + (f*g*x^2)/d), x], x, Sqrt[c + d*x]], x] /; FreeQ[{F, c, d, e, f, g}, x] &&  !$UseGamma === True

Rule 2204

Int[(F_)^((a_.) + (b_.)*((c_.) + (d_.)*(x_))^2), x_Symbol] :> Simp[(F^a*Sqrt[Pi]*Erfi[(c + d*x)*Rt[b*Log[F], 2
]])/(2*d*Rt[b*Log[F], 2]), x] /; FreeQ[{F, a, b, c, d}, x] && PosQ[b]

Rule 2205

Int[(F_)^((a_.) + (b_.)*((c_.) + (d_.)*(x_))^2), x_Symbol] :> Simp[(F^a*Sqrt[Pi]*Erf[(c + d*x)*Rt[-(b*Log[F]),
2]])/(2*d*Rt[-(b*Log[F]), 2]), x] /; FreeQ[{F, a, b, c, d}, x] && NegQ[b]

Rule 12

Int[(a_)*(u_), x_Symbol] :> Dist[a, Int[u, x], x] /; FreeQ[a, x] &&  !MatchQ[u, (b_)*(v_) /; FreeQ[b, x]]

Rubi steps

\begin{align*} \int \frac{x^3}{\cosh ^{-1}(a x)^{5/2}} \, dx &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}-\frac{2 \int \frac{x^2}{\sqrt{-1+a x} \sqrt{1+a x} \cosh ^{-1}(a x)^{3/2}} \, dx}{a}+\frac{1}{3} (8 a) \int \frac{x^4}{\sqrt{-1+a x} \sqrt{1+a x} \cosh ^{-1}(a x)^{3/2}} \, dx\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}+\frac{64}{3} \int \frac{x^3}{\sqrt{\cosh ^{-1}(a x)}} \, dx-\frac{8 \int \frac{x}{\sqrt{\cosh ^{-1}(a x)}} \, dx}{a^2}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{8 \operatorname{Subst}\left (\int \frac{\cosh (x) \sinh (x)}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{a^4}+\frac{64 \operatorname{Subst}\left (\int \frac{\cosh ^3(x) \sinh (x)}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{8 \operatorname{Subst}\left (\int \frac{\sinh (2 x)}{2 \sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{a^4}+\frac{64 \operatorname{Subst}\left (\int \left (\frac{\sinh (2 x)}{4 \sqrt{x}}+\frac{\sinh (4 x)}{8 \sqrt{x}}\right ) \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}+\frac{8 \operatorname{Subst}\left (\int \frac{\sinh (4 x)}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}-\frac{4 \operatorname{Subst}\left (\int \frac{\sinh (2 x)}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{a^4}+\frac{16 \operatorname{Subst}\left (\int \frac{\sinh (2 x)}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{4 \operatorname{Subst}\left (\int \frac{e^{-4 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}+\frac{4 \operatorname{Subst}\left (\int \frac{e^{4 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}+\frac{2 \operatorname{Subst}\left (\int \frac{e^{-2 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{a^4}-\frac{2 \operatorname{Subst}\left (\int \frac{e^{2 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{a^4}-\frac{8 \operatorname{Subst}\left (\int \frac{e^{-2 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}+\frac{8 \operatorname{Subst}\left (\int \frac{e^{2 x}}{\sqrt{x}} \, dx,x,\cosh ^{-1}(a x)\right )}{3 a^4}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{8 \operatorname{Subst}\left (\int e^{-4 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{8 \operatorname{Subst}\left (\int e^{4 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{4 \operatorname{Subst}\left (\int e^{-2 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{a^4}-\frac{4 \operatorname{Subst}\left (\int e^{2 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{a^4}-\frac{16 \operatorname{Subst}\left (\int e^{-2 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{16 \operatorname{Subst}\left (\int e^{2 x^2} \, dx,x,\sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}\\ &=-\frac{2 x^3 \sqrt{-1+a x} \sqrt{1+a x}}{3 a \cosh ^{-1}(a x)^{3/2}}+\frac{4 x^2}{a^2 \sqrt{\cosh ^{-1}(a x)}}-\frac{16 x^4}{3 \sqrt{\cosh ^{-1}(a x)}}-\frac{2 \sqrt{\pi } \text{erf}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}-\frac{\sqrt{2 \pi } \text{erf}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{2 \sqrt{\pi } \text{erfi}\left (2 \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}+\frac{\sqrt{2 \pi } \text{erfi}\left (\sqrt{2} \sqrt{\cosh ^{-1}(a x)}\right )}{3 a^4}\\ \end{align*}

Mathematica [A]  time = 0.758529, size = 175, normalized size = 1.02 \[ \frac{-4 \cosh ^{-1}(a x) \left (-2 \sqrt{-\cosh ^{-1}(a x)} \text{Gamma}\left (\frac{1}{2},-4 \cosh ^{-1}(a x)\right )-2 \sqrt{\cosh ^{-1}(a x)} \text{Gamma}\left (\frac{1}{2},4 \cosh ^{-1}(a x)\right )+e^{-4 \cosh ^{-1}(a x)}+e^{4 \cosh ^{-1}(a x)}\right )-2 \left (2 \cosh ^{-1}(a x) \left (-\sqrt{2} \sqrt{-\cosh ^{-1}(a x)} \text{Gamma}\left (\frac{1}{2},-2 \cosh ^{-1}(a x)\right )-\sqrt{2} \sqrt{\cosh ^{-1}(a x)} \text{Gamma}\left (\frac{1}{2},2 \cosh ^{-1}(a x)\right )+e^{-2 \cosh ^{-1}(a x)}+e^{2 \cosh ^{-1}(a x)}\right )+\sinh \left (2 \cosh ^{-1}(a x)\right )\right )-\sinh \left (4 \cosh ^{-1}(a x)\right )}{12 a^4 \cosh ^{-1}(a x)^{3/2}} \]

Warning: Unable to verify antiderivative.

[In]

Integrate[x^3/ArcCosh[a*x]^(5/2),x]

[Out]

(-4*ArcCosh[a*x]*(E^(-4*ArcCosh[a*x]) + E^(4*ArcCosh[a*x]) - 2*Sqrt[-ArcCosh[a*x]]*Gamma[1/2, -4*ArcCosh[a*x]]
- 2*Sqrt[ArcCosh[a*x]]*Gamma[1/2, 4*ArcCosh[a*x]]) - 2*(2*ArcCosh[a*x]*(E^(-2*ArcCosh[a*x]) + E^(2*ArcCosh[a*
x]) - Sqrt[2]*Sqrt[-ArcCosh[a*x]]*Gamma[1/2, -2*ArcCosh[a*x]] - Sqrt[2]*Sqrt[ArcCosh[a*x]]*Gamma[1/2, 2*ArcCos
h[a*x]]) + Sinh[2*ArcCosh[a*x]]) - Sinh[4*ArcCosh[a*x]])/(12*a^4*ArcCosh[a*x]^(3/2))

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Maple [F]  time = 0.102, size = 0, normalized size = 0. \begin{align*} \int{{x}^{3} \left ({\rm arccosh} \left (ax\right ) \right ) ^{-{\frac{5}{2}}}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^3/arccosh(a*x)^(5/2),x)

[Out]

int(x^3/arccosh(a*x)^(5/2),x)

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Maxima [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{3}}{\operatorname{arcosh}\left (a x\right )^{\frac{5}{2}}}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3/arccosh(a*x)^(5/2),x, algorithm="maxima")

[Out]

integrate(x^3/arccosh(a*x)^(5/2), x)

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Fricas [F(-2)]  time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: UnboundLocalError} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3/arccosh(a*x)^(5/2),x, algorithm="fricas")

[Out]

Exception raised: UnboundLocalError

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Sympy [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{x^{3}}{\operatorname{acosh}^{\frac{5}{2}}{\left (a x \right )}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**3/acosh(a*x)**(5/2),x)

[Out]

Integral(x**3/acosh(a*x)**(5/2), x)

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \mathit{sage}_{0} x \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3/arccosh(a*x)^(5/2),x, algorithm="giac")

[Out]

sage0*x