3.8.13 \(\int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx\) [713]

3.8.13.1 Optimal result

Integrand size = 17, antiderivative size = 83 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=-48 \sqrt {2+\sqrt {1+\sqrt {x}}}+\frac {88}{3} \left (2+\sqrt {1+\sqrt {x}}\right )^{3/2}-\frac {48}{5} \left (2+\sqrt {1+\sqrt {x}}\right )^{5/2}+\frac {8}{7} \left (2+\sqrt {1+\sqrt {x}}\right )^{7/2} \]

output

88/3*(2+(1+x^(1/2))^(1/2))^(3/2)-48/5*(2+(1+x^(1/2))^(1/2))^(5/2)+8/7*(2+( 
1+x^(1/2))^(1/2))^(7/2)-48*(2+(1+x^(1/2))^(1/2))^(1/2)
 

3.8.13.2 Mathematica [A] (verified)

Time = 0.06 (sec) , antiderivative size = 58, normalized size of antiderivative = 0.70 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\frac {8}{105} \sqrt {2+\sqrt {1+\sqrt {x}}} \left (-280+76 \sqrt {1+\sqrt {x}}+3 \left (-12+5 \sqrt {1+\sqrt {x}}\right ) \sqrt {x}\right ) \]

input

Integrate[1/Sqrt[2 + Sqrt[1 + Sqrt[x]]],x]
 

output

(8*Sqrt[2 + Sqrt[1 + Sqrt[x]]]*(-280 + 76*Sqrt[1 + Sqrt[x]] + 3*(-12 + 5*S 
qrt[1 + Sqrt[x]])*Sqrt[x]))/105
 

3.8.13.3 Rubi [A] (warning: unable to verify)

Time = 0.26 (sec) , antiderivative size = 61, normalized size of antiderivative = 0.73, number of steps used = 7, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.353, Rules used = {7267, 896, 25, 1732, 522, 2009}

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.

\(\displaystyle \int \frac {1}{\sqrt {\sqrt {\sqrt {x}+1}+2}} \, dx\)

\(\Big \downarrow \) 7267

\(\displaystyle 2 \int \frac {\sqrt {x}}{\sqrt {\sqrt {\sqrt {x}+1}+2}}d\sqrt {x}\)

\(\Big \downarrow \) 896

\(\displaystyle 2 \int \frac {\sqrt {x}}{\sqrt {\sqrt [4]{x}+2}}d\left (\sqrt {x}+1\right )\)

\(\Big \downarrow \) 25

\(\displaystyle -2 \int -\frac {\sqrt {x}}{\sqrt {\sqrt [4]{x}+2}}d\left (\sqrt {x}+1\right )\)

\(\Big \downarrow \) 1732

\(\displaystyle -4 \int \frac {(1-x) \sqrt [4]{x}}{\sqrt {\sqrt {x}+3}}d\sqrt [4]{x}\)

\(\Big \downarrow \) 522

\(\displaystyle -4 \int \left (-\left (\sqrt {x}+3\right )^{5/2}+6 \left (\sqrt {x}+3\right )^{3/2}-11 \sqrt {\sqrt {x}+3}+\frac {6}{\sqrt {\sqrt {x}+3}}\right )d\sqrt [4]{x}\)

\(\Big \downarrow \) 2009

\(\displaystyle -4 \left (-\frac {2}{7} \left (\sqrt {x}+3\right )^{7/2}+\frac {12}{5} \left (\sqrt {x}+3\right )^{5/2}-\frac {22}{3} \left (\sqrt {x}+3\right )^{3/2}+12 \sqrt {\sqrt {x}+3}\right )\)

input

Int[1/Sqrt[2 + Sqrt[1 + Sqrt[x]]],x]
 

output

-4*(12*Sqrt[3 + Sqrt[x]] - (22*(3 + Sqrt[x])^(3/2))/3 + (12*(3 + Sqrt[x])^ 
(5/2))/5 - (2*(3 + Sqrt[x])^(7/2))/7)
 

3.8.13.3.1 Defintions of rubi rules used

rule 25

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

rule 522

Int[((e_.)*(x_))^(m_.)*((c_) + (d_.)*(x_))^(n_.)*((a_) + (b_.)*(x_)^2)^(p_. 
), x_Symbol] :> Int[ExpandIntegrand[(e*x)^m*(c + d*x)^n*(a + b*x^2)^p, x], 
x] /; FreeQ[{a, b, c, d, e, m, n}, x] && IGtQ[p, 0]
 

rule 896

Int[((a_) + (b_.)*(v_)^(n_))^(p_.)*(x_)^(m_.), x_Symbol] :> With[{c = Coeff 
icient[v, x, 0], d = Coefficient[v, x, 1]}, Simp[1/d^(m + 1)   Subst[Int[Si 
mplifyIntegrand[(x - c)^m*(a + b*x^n)^p, x], x], x, v], x] /; NeQ[c, 0]] /; 
 FreeQ[{a, b, n, p}, x] && LinearQ[v, x] && IntegerQ[m]
 

rule 1732

Int[((a_) + (c_.)*(x_)^(n2_.))^(p_.)*((d_) + (e_.)*(x_)^(n_))^(q_.), x_Symb 
ol] :> With[{g = Denominator[n]}, Simp[g   Subst[Int[x^(g - 1)*(d + e*x^(g* 
n))^q*(a + c*x^(2*g*n))^p, x], x, x^(1/g)], x]] /; FreeQ[{a, c, d, e, p, q} 
, x] && EqQ[n2, 2*n] && FractionQ[n]
 

rule 2009

Int[u_, x_Symbol] :> Simp[IntSum[u, x], x] /; SumQ[u]
 

rule 7267

Int[u_, x_Symbol] :> With[{lst = SubstForFractionalPowerOfLinear[u, x]}, Si 
mp[lst[[2]]*lst[[4]]   Subst[Int[lst[[1]], x], x, lst[[3]]^(1/lst[[2]])], x 
] /;  !FalseQ[lst] && SubstForFractionalPowerQ[u, lst[[3]], x]]
 

3.8.13.4 Maple [A] (verified)

Time = 0.36 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.65

method	result	size
derivativedivides	\(\frac {88 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {3}{2}}}{3}-\frac {48 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {5}{2}}}{5}+\frac {8 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {7}{2}}}{7}-48 \sqrt {2+\sqrt {1+\sqrt {x}}}\)	\(54\)
default	\(\frac {88 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {3}{2}}}{3}-\frac {48 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {5}{2}}}{5}+\frac {8 \left (2+\sqrt {1+\sqrt {x}}\right )^{\frac {7}{2}}}{7}-48 \sqrt {2+\sqrt {1+\sqrt {x}}}\)	\(54\)

input

int(1/(2+(1+x^(1/2))^(1/2))^(1/2),x,method=_RETURNVERBOSE)
 

output

88/3*(2+(1+x^(1/2))^(1/2))^(3/2)-48/5*(2+(1+x^(1/2))^(1/2))^(5/2)+8/7*(2+( 
1+x^(1/2))^(1/2))^(7/2)-48*(2+(1+x^(1/2))^(1/2))^(1/2)
 

3.8.13.5 Fricas [A] (verification not implemented)

Time = 0.29 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.42 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\frac {8}{105} \, {\left ({\left (15 \, \sqrt {x} + 76\right )} \sqrt {\sqrt {x} + 1} - 36 \, \sqrt {x} - 280\right )} \sqrt {\sqrt {\sqrt {x} + 1} + 2} \]

input

integrate(1/(2+(1+x^(1/2))^(1/2))^(1/2),x, algorithm="fricas")
 

output

8/105*((15*sqrt(x) + 76)*sqrt(sqrt(x) + 1) - 36*sqrt(x) - 280)*sqrt(sqrt(s 
qrt(x) + 1) + 2)
 

3.8.13.6 Sympy [A] (verification not implemented)

Time = 0.40 (sec) , antiderivative size = 71, normalized size of antiderivative = 0.86 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\frac {8 \left (\sqrt {\sqrt {x} + 1} + 2\right )^{\frac {7}{2}}}{7} - \frac {48 \left (\sqrt {\sqrt {x} + 1} + 2\right )^{\frac {5}{2}}}{5} + \frac {88 \left (\sqrt {\sqrt {x} + 1} + 2\right )^{\frac {3}{2}}}{3} - 48 \sqrt {\sqrt {\sqrt {x} + 1} + 2} \]

input

integrate(1/(2+(1+x**(1/2))**(1/2))**(1/2),x)
 

output

8*(sqrt(sqrt(x) + 1) + 2)**(7/2)/7 - 48*(sqrt(sqrt(x) + 1) + 2)**(5/2)/5 + 
 88*(sqrt(sqrt(x) + 1) + 2)**(3/2)/3 - 48*sqrt(sqrt(sqrt(x) + 1) + 2)
 

3.8.13.7 Maxima [A] (verification not implemented)

Time = 0.20 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.64 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\frac {8}{7} \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {7}{2}} - \frac {48}{5} \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {5}{2}} + \frac {88}{3} \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {3}{2}} - 48 \, \sqrt {\sqrt {\sqrt {x} + 1} + 2} \]

input

integrate(1/(2+(1+x^(1/2))^(1/2))^(1/2),x, algorithm="maxima")
 

output

8/7*(sqrt(sqrt(x) + 1) + 2)^(7/2) - 48/5*(sqrt(sqrt(x) + 1) + 2)^(5/2) + 8 
8/3*(sqrt(sqrt(x) + 1) + 2)^(3/2) - 48*sqrt(sqrt(sqrt(x) + 1) + 2)
 

3.8.13.8 Giac [A] (verification not implemented)

Time = 0.39 (sec) , antiderivative size = 82, normalized size of antiderivative = 0.99 \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\frac {8 \, {\left (15 \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {7}{2}} - 126 \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {5}{2}} + 385 \, {\left (\sqrt {\sqrt {x} + 1} + 2\right )}^{\frac {3}{2}} - 630 \, \sqrt {\sqrt {\sqrt {x} + 1} + 2}\right )}}{105 \, \mathrm {sgn}\left (4 \, {\left (\sqrt {x} + 1\right )}^{2} - 8 \, \sqrt {x} - 7\right ) \mathrm {sgn}\left (4 \, x - 3\right )} \]

input

integrate(1/(2+(1+x^(1/2))^(1/2))^(1/2),x, algorithm="giac")
 

output

8/105*(15*(sqrt(sqrt(x) + 1) + 2)^(7/2) - 126*(sqrt(sqrt(x) + 1) + 2)^(5/2 
) + 385*(sqrt(sqrt(x) + 1) + 2)^(3/2) - 630*sqrt(sqrt(sqrt(x) + 1) + 2))/( 
sgn(4*(sqrt(x) + 1)^2 - 8*sqrt(x) - 7)*sgn(4*x - 3))
 

3.8.13.9 Mupad [F(-1)]

Timed out. \[ \int \frac {1}{\sqrt {2+\sqrt {1+\sqrt {x}}}} \, dx=\int \frac {1}{\sqrt {\sqrt {\sqrt {x}+1}+2}} \,d x \]

input

int(1/((x^(1/2) + 1)^(1/2) + 2)^(1/2),x)
 

output

int(1/((x^(1/2) + 1)^(1/2) + 2)^(1/2), x)