3.2.47 \(\int (a+b \text {arccosh}(c x))^{3/2} \, dx\) [147]

3.2.47.1 Optimal result

Integrand size = 12, antiderivative size = 140 \[ \int (a+b \text {arccosh}(c x))^{3/2} \, dx=-\frac {3 b \sqrt {-1+c x} \sqrt {1+c x} \sqrt {a+b \text {arccosh}(c x)}}{2 c}+x (a+b \text {arccosh}(c x))^{3/2}-\frac {3 b^{3/2} e^{a/b} \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{8 c}+\frac {3 b^{3/2} e^{-\frac {a}{b}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{8 c} \]

output

x*(a+b*arccosh(c*x))^(3/2)-3/8*b^(3/2)*exp(a/b)*erf((a+b*arccosh(c*x))^(1/ 
2)/b^(1/2))*Pi^(1/2)/c+3/8*b^(3/2)*erfi((a+b*arccosh(c*x))^(1/2)/b^(1/2))* 
Pi^(1/2)/c/exp(a/b)-3/2*b*(c*x-1)^(1/2)*(c*x+1)^(1/2)*(a+b*arccosh(c*x))^( 
1/2)/c
 

3.2.47.2 Mathematica [A] (warning: unable to verify)

Time = 0.41 (sec) , antiderivative size = 269, normalized size of antiderivative = 1.92 \[ \int (a+b \text {arccosh}(c x))^{3/2} \, dx=\frac {a e^{-\frac {a}{b}} \sqrt {a+b \text {arccosh}(c x)} \left (\frac {e^{\frac {2 a}{b}} \Gamma \left (\frac {3}{2},\frac {a}{b}+\text {arccosh}(c x)\right )}{\sqrt {\frac {a}{b}+\text {arccosh}(c x)}}+\frac {\Gamma \left (\frac {3}{2},-\frac {a+b \text {arccosh}(c x)}{b}\right )}{\sqrt {-\frac {a+b \text {arccosh}(c x)}{b}}}\right )}{2 c}+\frac {b \left (-12 \sqrt {\frac {-1+c x}{1+c x}} (1+c x) \sqrt {a+b \text {arccosh}(c x)}+8 c x \text {arccosh}(c x) \sqrt {a+b \text {arccosh}(c x)}+\frac {(2 a+3 b) \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right ) \left (\cosh \left (\frac {a}{b}\right )-\sinh \left (\frac {a}{b}\right )\right )}{\sqrt {b}}+\frac {(2 a-3 b) \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right ) \left (\cosh \left (\frac {a}{b}\right )+\sinh \left (\frac {a}{b}\right )\right )}{\sqrt {b}}\right )}{8 c} \]

input

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

output

(a*Sqrt[a + b*ArcCosh[c*x]]*((E^((2*a)/b)*Gamma[3/2, a/b + ArcCosh[c*x]])/ 
Sqrt[a/b + ArcCosh[c*x]] + Gamma[3/2, -((a + b*ArcCosh[c*x])/b)]/Sqrt[-((a 
 + b*ArcCosh[c*x])/b)]))/(2*c*E^(a/b)) + (b*(-12*Sqrt[(-1 + c*x)/(1 + c*x) 
]*(1 + c*x)*Sqrt[a + b*ArcCosh[c*x]] + 8*c*x*ArcCosh[c*x]*Sqrt[a + b*ArcCo 
sh[c*x]] + ((2*a + 3*b)*Sqrt[Pi]*Erfi[Sqrt[a + b*ArcCosh[c*x]]/Sqrt[b]]*(C 
osh[a/b] - Sinh[a/b]))/Sqrt[b] + ((2*a - 3*b)*Sqrt[Pi]*Erf[Sqrt[a + b*ArcC 
osh[c*x]]/Sqrt[b]]*(Cosh[a/b] + Sinh[a/b]))/Sqrt[b]))/(8*c)
 

3.2.47.3 Rubi [C] (verified)

Result contains complex when optimal does not.

Time = 0.88 (sec) , antiderivative size = 151, normalized size of antiderivative = 1.08, number of steps used = 11, number of rules used = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.833, Rules used = {6294, 6330, 6296, 25, 3042, 26, 3789, 2611, 2633, 2634}

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.

\(\displaystyle \int (a+b \text {arccosh}(c x))^{3/2} \, dx\)

\(\Big \downarrow \) 6294

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \int \frac {x \sqrt {a+b \text {arccosh}(c x)}}{\sqrt {c x-1} \sqrt {c x+1}}dx\)

\(\Big \downarrow \) 6330

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {b \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}}dx}{2 c}\right )\)

\(\Big \downarrow \) 6296

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {\int -\frac {\sinh \left (\frac {a}{b}-\frac {a+b \text {arccosh}(c x)}{b}\right )}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))}{2 c^2}\right )\)

\(\Big \downarrow \) 25

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\int \frac {\sinh \left (\frac {a}{b}-\frac {a+b \text {arccosh}(c x)}{b}\right )}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))}{2 c^2}+\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}\right )\)

\(\Big \downarrow \) 3042

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}+\frac {\int -\frac {i \sin \left (\frac {i a}{b}-\frac {i (a+b \text {arccosh}(c x))}{b}\right )}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))}{2 c^2}\right )\)

\(\Big \downarrow \) 26

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {i \int \frac {\sin \left (\frac {i a}{b}-\frac {i (a+b \text {arccosh}(c x))}{b}\right )}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))}{2 c^2}\right )\)

\(\Big \downarrow \) 3789

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {i \left (\frac {1}{2} i \int \frac {e^{-\text {arccosh}(c x)}}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))-\frac {1}{2} i \int \frac {e^{\text {arccosh}(c x)}}{\sqrt {a+b \text {arccosh}(c x)}}d(a+b \text {arccosh}(c x))\right )}{2 c^2}\right )\)

\(\Big \downarrow \) 2611

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {i \left (i \int e^{\frac {a}{b}-\frac {a+b \text {arccosh}(c x)}{b}}d\sqrt {a+b \text {arccosh}(c x)}-i \int e^{\frac {a+b \text {arccosh}(c x)}{b}-\frac {a}{b}}d\sqrt {a+b \text {arccosh}(c x)}\right )}{2 c^2}\right )\)

\(\Big \downarrow \) 2633

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {i \left (i \int e^{\frac {a}{b}-\frac {a+b \text {arccosh}(c x)}{b}}d\sqrt {a+b \text {arccosh}(c x)}-\frac {1}{2} i \sqrt {\pi } \sqrt {b} e^{-\frac {a}{b}} \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )\right )}{2 c^2}\right )\)

\(\Big \downarrow \) 2634

\(\displaystyle x (a+b \text {arccosh}(c x))^{3/2}-\frac {3}{2} b c \left (\frac {\sqrt {c x-1} \sqrt {c x+1} \sqrt {a+b \text {arccosh}(c x)}}{c^2}-\frac {i \left (\frac {1}{2} i \sqrt {\pi } \sqrt {b} e^{a/b} \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )-\frac {1}{2} i \sqrt {\pi } \sqrt {b} e^{-\frac {a}{b}} \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )\right )}{2 c^2}\right )\)

input

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

output

x*(a + b*ArcCosh[c*x])^(3/2) - (3*b*c*((Sqrt[-1 + c*x]*Sqrt[1 + c*x]*Sqrt[ 
a + b*ArcCosh[c*x]])/c^2 - ((I/2)*((I/2)*Sqrt[b]*E^(a/b)*Sqrt[Pi]*Erf[Sqrt 
[a + b*ArcCosh[c*x]]/Sqrt[b]] - ((I/2)*Sqrt[b]*Sqrt[Pi]*Erfi[Sqrt[a + b*Ar 
cCosh[c*x]]/Sqrt[b]])/E^(a/b)))/c^2))/2
 

3.2.47.3.1 Defintions of rubi rules used

rule 25

Int[-(Fx_), x_Symbol] :> Simp[Identity[-1]   Int[Fx, x], x]
 

rule 26

Int[(Complex[0, a_])*(Fx_), x_Symbol] :> Simp[(Complex[Identity[0], a])   I 
nt[Fx, x], x] /; FreeQ[a, x] && EqQ[a^2, 1]
 

rule 2611

Int[(F_)^((g_.)*((e_.) + (f_.)*(x_)))/Sqrt[(c_.) + (d_.)*(x_)], x_Symbol] : 
> Simp[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 2633

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 2634

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] /; Fr 
eeQ[{F, a, b, c, d}, x] && NegQ[b]
 

rule 3042

Int[u_, x_Symbol] :> Int[DeactivateTrig[u, x], x] /; FunctionOfTrigOfLinear 
Q[u, x]
 

rule 3789

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

rule 6294

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_.), x_Symbol] :> Simp[x*(a + b*A 
rcCosh[c*x])^n, x] - Simp[b*c*n   Int[x*((a + b*ArcCosh[c*x])^(n - 1)/(Sqrt 
[1 + c*x]*Sqrt[-1 + c*x])), x], x] /; FreeQ[{a, b, c}, x] && GtQ[n, 0]
 

rule 6296

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_), x_Symbol] :> Simp[1/(b*c)   S 
ubst[Int[x^n*Sinh[-a/b + x/b], x], x, a + b*ArcCosh[c*x]], x] /; FreeQ[{a, 
b, c, n}, x]
 

rule 6330

Int[((a_.) + ArcCosh[(c_.)*(x_)]*(b_.))^(n_.)*(x_)*((d1_) + (e1_.)*(x_))^(p 
_)*((d2_) + (e2_.)*(x_))^(p_), x_Symbol] :> Simp[(d1 + e1*x)^(p + 1)*(d2 + 
e2*x)^(p + 1)*((a + b*ArcCosh[c*x])^n/(2*e1*e2*(p + 1))), x] - Simp[b*(n/(2 
*c*(p + 1)))*Simp[(d1 + e1*x)^p/(1 + c*x)^p]*Simp[(d2 + e2*x)^p/(-1 + c*x)^ 
p]   Int[(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, p}, x] && EqQ[e1, c*d1] && E 
qQ[e2, (-c)*d2] && GtQ[n, 0] && NeQ[p, -1]
 

3.2.47.4 Maple [F]

\[\int \left (a +b \,\operatorname {arccosh}\left (c x \right )\right )^{\frac {3}{2}}d x\]

input

int((a+b*arccosh(c*x))^(3/2),x)
 

output

int((a+b*arccosh(c*x))^(3/2),x)
 

3.2.47.5 Fricas [F(-2)]

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

input

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

output

Exception raised: TypeError >>  Error detected within library code:   inte 
grate: implementation incomplete (constant residues)
 

3.2.47.6 Sympy [F]

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

input

integrate((a+b*acosh(c*x))**(3/2),x)
 

output

Integral((a + b*acosh(c*x))**(3/2), x)
 

3.2.47.7 Maxima [F]

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

input

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

output

integrate((b*arccosh(c*x) + a)^(3/2), x)
 

3.2.47.8 Giac [F]

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

input

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

output

integrate((b*arccosh(c*x) + a)^(3/2), x)
 

3.2.47.9 Mupad [F(-1)]

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

input

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

output

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