\(\int x \text {arccosh}(a x)^{3/2} \, dx\) [81]

Optimal result

Integrand size = 10, antiderivative size = 127 \[ \int x \text {arccosh}(a x)^{3/2} \, dx=-\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {3 \sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2}+\frac {3 \sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2} \]

[Out]

-1/4*arccosh(a*x)^(3/2)/a^2+1/2*x^2*arccosh(a*x)^(3/2)-3/128*erf(2^(1/2)*arccosh(a*x)^(1/2))*2^(1/2)*Pi^(1/2)/
a^2+3/128*erfi(2^(1/2)*arccosh(a*x)^(1/2))*2^(1/2)*Pi^(1/2)/a^2-3/8*x*(a*x-1)^(1/2)*(a*x+1)^(1/2)*arccosh(a*x)
^(1/2)/a

Rubi [A] (verified)

Time = 0.31 (sec) , antiderivative size = 127, normalized size of antiderivative = 1.00, number of steps used = 11, number of rules used = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.000, Rules used = {5884, 5939, 5893, 5887, 5556, 12, 3389, 2211, 2235, 2236} \[ \int x \text {arccosh}(a x)^{3/2} \, dx=-\frac {3 \sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2}+\frac {3 \sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {3 x \sqrt {a x-1} \sqrt {a x+1} \sqrt {\text {arccosh}(a x)}}{8 a} \]

[In]

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

[Out]

(-3*x*Sqrt[-1 + a*x]*Sqrt[1 + a*x]*Sqrt[ArcCosh[a*x]])/(8*a) - ArcCosh[a*x]^(3/2)/(4*a^2) + (x^2*ArcCosh[a*x]^
(3/2))/2 - (3*Sqrt[Pi/2]*Erf[Sqrt[2]*Sqrt[ArcCosh[a*x]]])/(64*a^2) + (3*Sqrt[Pi/2]*Erfi[Sqrt[2]*Sqrt[ArcCosh[a
*x]]])/(64*a^2)

Rule 12

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

Rule 2211

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] &&  !TrueQ[$UseGamma]

Rule 2235

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 2236

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 3389

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 5556

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 5884

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_)*(x_)^(m_.), x_Symbol] :> Simp[x^(m + 1)*((a + b*ArcCosh[c*x])^n/(
m + 1)), x] - Dist[b*c*(n/(m + 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] && GtQ[n, 0]

Rule 5887

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

Rule 5893

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_.)/(Sqrt[(d1_) + (e1_.)*(x_)]*Sqrt[(d2_) + (e2_.)*(x_)]), x_Symbol]
:> Simp[(1/(b*c*(n + 1)))*Simp[Sqrt[1 + c*x]/Sqrt[d1 + e1*x]]*Simp[Sqrt[-1 + c*x]/Sqrt[d2 + e2*x]]*(a + b*Arc
Cosh[c*x])^(n + 1), x] /; FreeQ[{a, b, c, d1, e1, d2, e2, n}, x] && EqQ[e1, c*d1] && EqQ[e2, (-c)*d2] && NeQ[n
, -1]

Rule 5939

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_.)*((f_.)*(x_))^(m_)*((d1_) + (e1_.)*(x_))^(p_)*((d2_) + (e2_.)*(x_
))^(p_), x_Symbol] :> Simp[f*(f*x)^(m - 1)*(d1 + e1*x)^(p + 1)*(d2 + e2*x)^(p + 1)*((a + b*ArcCosh[c*x])^n/(e1
*e2*(m + 2*p + 1))), x] + (Dist[f^2*((m - 1)/(c^2*(m + 2*p + 1))), Int[(f*x)^(m - 2)*(d1 + e1*x)^p*(d2 + e2*x)
^p*(a + b*ArcCosh[c*x])^n, x], x] - Dist[b*f*(n/(c*(m + 2*p + 1)))*Simp[(d1 + e1*x)^p/(1 + c*x)^p]*Simp[(d2 +
e2*x)^p/(-1 + c*x)^p], Int[(f*x)^(m - 1)*(1 + c*x)^(p + 1/2)*(-1 + c*x)^(p + 1/2)*(a + b*ArcCosh[c*x])^(n - 1)
, x], x]) /; FreeQ[{a, b, c, d1, e1, d2, e2, f, p}, x] && EqQ[e1, c*d1] && EqQ[e2, (-c)*d2] && GtQ[n, 0] && IG
tQ[m, 1] && NeQ[m + 2*p + 1, 0]

Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {1}{4} (3 a) \int \frac {x^2 \sqrt {\text {arccosh}(a x)}}{\sqrt {-1+a x} \sqrt {1+a x}} \, dx \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}+\frac {3}{16} \int \frac {x}{\sqrt {\text {arccosh}(a x)}} \, dx-\frac {3 \int \frac {\sqrt {\text {arccosh}(a x)}}{\sqrt {-1+a x} \sqrt {1+a x}} \, dx}{8 a} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}+\frac {3 \text {Subst}\left (\int \frac {\cosh (x) \sinh (x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{16 a^2} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}+\frac {3 \text {Subst}\left (\int \frac {\sinh (2 x)}{2 \sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{16 a^2} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}+\frac {3 \text {Subst}\left (\int \frac {\sinh (2 x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{32 a^2} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {3 \text {Subst}\left (\int \frac {e^{-2 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{64 a^2}+\frac {3 \text {Subst}\left (\int \frac {e^{2 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{64 a^2} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {3 \text {Subst}\left (\int e^{-2 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{32 a^2}+\frac {3 \text {Subst}\left (\int e^{2 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{32 a^2} \\ & = -\frac {3 x \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}}{8 a}-\frac {\text {arccosh}(a x)^{3/2}}{4 a^2}+\frac {1}{2} x^2 \text {arccosh}(a x)^{3/2}-\frac {3 \sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2}+\frac {3 \sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{64 a^2} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.09 (sec) , antiderivative size = 84, normalized size of antiderivative = 0.66 \[ \int x \text {arccosh}(a x)^{3/2} \, dx=\frac {32 \text {arccosh}(a x)^{3/2} \cosh (2 \text {arccosh}(a x))+3 \sqrt {2 \pi } \left (-\text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )+\text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )\right )-24 \sqrt {\text {arccosh}(a x)} \sinh (2 \text {arccosh}(a x))}{128 a^2} \]

[In]

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

[Out]

(32*ArcCosh[a*x]^(3/2)*Cosh[2*ArcCosh[a*x]] + 3*Sqrt[2*Pi]*(-Erf[Sqrt[2]*Sqrt[ArcCosh[a*x]]] + Erfi[Sqrt[2]*Sq
rt[ArcCosh[a*x]]]) - 24*Sqrt[ArcCosh[a*x]]*Sinh[2*ArcCosh[a*x]])/(128*a^2)

Maple [A] (verified)

Time = 0.31 (sec) , antiderivative size = 105, normalized size of antiderivative = 0.83

method	result	size
default	\(-\frac {\sqrt {2}\, \left (-32 \sqrt {2}\, \operatorname {arccosh}\left (a x \right )^{\frac {3}{2}} \sqrt {\pi }\, a^{2} x^{2}+24 \sqrt {2}\, \sqrt {\operatorname {arccosh}\left (a x \right )}\, \sqrt {\pi }\, \sqrt {a x +1}\, \sqrt {a x -1}\, a x +16 \sqrt {2}\, \operatorname {arccosh}\left (a x \right )^{\frac {3}{2}} \sqrt {\pi }+3 \pi \,\operatorname {erf}\left (\sqrt {2}\, \sqrt {\operatorname {arccosh}\left (a x \right )}\right )-3 \pi \,\operatorname {erfi}\left (\sqrt {2}\, \sqrt {\operatorname {arccosh}\left (a x \right )}\right )\right )}{128 \sqrt {\pi }\, a^{2}}\)	\(105\)

[In]

int(x*arccosh(a*x)^(3/2),x,method=_RETURNVERBOSE)

[Out]

-1/128*2^(1/2)*(-32*2^(1/2)*arccosh(a*x)^(3/2)*Pi^(1/2)*a^2*x^2+24*2^(1/2)*arccosh(a*x)^(1/2)*Pi^(1/2)*(a*x+1)
^(1/2)*(a*x-1)^(1/2)*a*x+16*2^(1/2)*arccosh(a*x)^(3/2)*Pi^(1/2)+3*Pi*erf(2^(1/2)*arccosh(a*x)^(1/2))-3*Pi*erfi
(2^(1/2)*arccosh(a*x)^(1/2)))/Pi^(1/2)/a^2

Fricas [F(-2)]

Exception generated. \[ \int x \text {arccosh}(a x)^{3/2} \, dx=\text {Exception raised: TypeError} \]

[In]

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

[Out]

Exception raised: TypeError >>  Error detected within library code:   integrate: implementation incomplete (co
nstant residues)

Sympy [F]

\[ \int x \text {arccosh}(a x)^{3/2} \, dx=\int x \operatorname {acosh}^{\frac {3}{2}}{\left (a x \right )}\, dx \]

[In]

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

[Out]

Integral(x*acosh(a*x)**(3/2), x)

Maxima [F]

\[ \int x \text {arccosh}(a x)^{3/2} \, dx=\int { x \operatorname {arcosh}\left (a x\right )^{\frac {3}{2}} \,d x } \]

[In]

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

[Out]

integrate(x*arccosh(a*x)^(3/2), x)

Giac [F]

\[ \int x \text {arccosh}(a x)^{3/2} \, dx=\int { x \operatorname {arcosh}\left (a x\right )^{\frac {3}{2}} \,d x } \]

[In]

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

[Out]

integrate(x*arccosh(a*x)^(3/2), x)

Mupad [F(-1)]

Timed out. \[ \int x \text {arccosh}(a x)^{3/2} \, dx=\int x\,{\mathrm {acosh}\left (a\,x\right )}^{3/2} \,d x \]

[In]

int(x*acosh(a*x)^(3/2),x)

[Out]

int(x*acosh(a*x)^(3/2), x)