\(\int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx\) [563]

Optimal result

Integrand size = 12, antiderivative size = 88 \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=-\frac {e^{a/b} \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}+\frac {e^{-\frac {a}{b}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \]

[Out]

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

Rubi [A] (verified)

Time = 0.08 (sec) , antiderivative size = 88, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.417, Rules used = {5881, 3389, 2211, 2236, 2235} \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\frac {\sqrt {\pi } e^{-\frac {a}{b}} \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}-\frac {\sqrt {\pi } e^{a/b} \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \]

[In]

Int[1/Sqrt[a + b*ArcCosh[c*x]],x]

[Out]

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

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 5881

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

Rubi steps \begin{align*} \text {integral}& = -\frac {\text {Subst}\left (\int \frac {\sinh \left (\frac {a}{b}-\frac {x}{b}\right )}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{b c} \\ & = -\frac {\text {Subst}\left (\int \frac {e^{-i \left (\frac {i a}{b}-\frac {i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{2 b c}+\frac {\text {Subst}\left (\int \frac {e^{i \left (\frac {i a}{b}-\frac {i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{2 b c} \\ & = -\frac {\text {Subst}\left (\int e^{\frac {a}{b}-\frac {x^2}{b}} \, dx,x,\sqrt {a+b \text {arccosh}(c x)}\right )}{b c}+\frac {\text {Subst}\left (\int e^{-\frac {a}{b}+\frac {x^2}{b}} \, dx,x,\sqrt {a+b \text {arccosh}(c x)}\right )}{b c} \\ & = -\frac {e^{a/b} \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}+\frac {e^{-\frac {a}{b}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.07 (sec) , antiderivative size = 100, normalized size of antiderivative = 1.14 \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\frac {e^{-\frac {a}{b}} \left (e^{\frac {2 a}{b}} \sqrt {\frac {a}{b}+\text {arccosh}(c x)} \Gamma \left (\frac {1}{2},\frac {a}{b}+\text {arccosh}(c x)\right )+\sqrt {-\frac {a+b \text {arccosh}(c x)}{b}} \Gamma \left (\frac {1}{2},-\frac {a+b \text {arccosh}(c x)}{b}\right )\right )}{2 c \sqrt {a+b \text {arccosh}(c x)}} \]

[In]

Integrate[1/Sqrt[a + b*ArcCosh[c*x]],x]

[Out]

(E^((2*a)/b)*Sqrt[a/b + ArcCosh[c*x]]*Gamma[1/2, a/b + ArcCosh[c*x]] + Sqrt[-((a + b*ArcCosh[c*x])/b)]*Gamma[1
/2, -((a + b*ArcCosh[c*x])/b)])/(2*c*E^(a/b)*Sqrt[a + b*ArcCosh[c*x]])

Maple [F]

\[\int \frac {1}{\sqrt {a +b \,\operatorname {arccosh}\left (c x \right )}}d x\]

[In]

int(1/(a+b*arccosh(c*x))^(1/2),x)

[Out]

int(1/(a+b*arccosh(c*x))^(1/2),x)

Fricas [F(-2)]

Exception generated. \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\text {Exception raised: TypeError} \]

[In]

integrate(1/(a+b*arccosh(c*x))^(1/2),x, algorithm="fricas")

[Out]

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

Sympy [F]

\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int \frac {1}{\sqrt {a + b \operatorname {acosh}{\left (c x \right )}}}\, dx \]

[In]

integrate(1/(a+b*acosh(c*x))**(1/2),x)

[Out]

Integral(1/sqrt(a + b*acosh(c*x)), x)

Maxima [F]

\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int { \frac {1}{\sqrt {b \operatorname {arcosh}\left (c x\right ) + a}} \,d x } \]

[In]

integrate(1/(a+b*arccosh(c*x))^(1/2),x, algorithm="maxima")

[Out]

integrate(1/sqrt(b*arccosh(c*x) + a), x)

Giac [F]

\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int { \frac {1}{\sqrt {b \operatorname {arcosh}\left (c x\right ) + a}} \,d x } \]

[In]

integrate(1/(a+b*arccosh(c*x))^(1/2),x, algorithm="giac")

[Out]

integrate(1/sqrt(b*arccosh(c*x) + a), x)

Mupad [F(-1)]

Timed out. \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int \frac {1}{\sqrt {a+b\,\mathrm {acosh}\left (c\,x\right )}} \,d x \]

[In]

int(1/(a + b*acosh(c*x))^(1/2),x)

[Out]

int(1/(a + b*acosh(c*x))^(1/2), x)