3.8.32 \(\int \sqrt {\frac {x}{1+x}} \, dx\) [732]

Optimal. Leaf size=22 \[ \sqrt {x} \sqrt {1+x}-\sinh ^{-1}\left (\sqrt {x}\right ) \]

[Out]

-arcsinh(x^(1/2))+x^(1/2)*(1+x)^(1/2)

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Rubi [A]
time = 0.00, antiderivative size = 22, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.364, Rules used = {1978, 52, 56, 221} \begin {gather*} \sqrt {x} \sqrt {x+1}-\sinh ^{-1}\left (\sqrt {x}\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Sqrt[x/(1 + x)],x]

[Out]

Sqrt[x]*Sqrt[1 + x] - ArcSinh[Sqrt[x]]

Rule 52

Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[(a + b*x)^(m + 1)*((c + d*x)^n/(b*(
m + n + 1))), x] + Dist[n*((b*c - a*d)/(b*(m + n + 1))), Int[(a + b*x)^m*(c + d*x)^(n - 1), x], x] /; FreeQ[{a
, b, c, d}, x] && NeQ[b*c - a*d, 0] && GtQ[n, 0] && NeQ[m + n + 1, 0] &&  !(IGtQ[m, 0] && ( !IntegerQ[n] || (G
tQ[m, 0] && LtQ[m - n, 0]))) &&  !ILtQ[m + n + 2, 0] && IntLinearQ[a, b, c, d, m, n, x]

Rule 56

Int[1/(Sqrt[(a_.) + (b_.)*(x_)]*Sqrt[(c_.) + (d_.)*(x_)]), x_Symbol] :> Dist[2/Sqrt[b], Subst[Int[1/Sqrt[b*c -
a*d + d*x^2], x], x, Sqrt[a + b*x]], x] /; FreeQ[{a, b, c, d}, x] && GtQ[b*c - a*d, 0] && GtQ[b, 0]

Rule 221

Int[1/Sqrt[(a_) + (b_.)*(x_)^2], x_Symbol] :> Simp[ArcSinh[Rt[b, 2]*(x/Sqrt[a])]/Rt[b, 2], x] /; FreeQ[{a, b},
x] && GtQ[a, 0] && PosQ[b]

Rule 1978

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

Rubi steps

\begin {align*} \int \sqrt {\frac {x}{1+x}} \, dx &=\int \frac {\sqrt {x}}{\sqrt {1+x}} \, dx\\ &=\sqrt {x} \sqrt {1+x}-\frac {1}{2} \int \frac {1}{\sqrt {x} \sqrt {1+x}} \, dx\\ &=\sqrt {x} \sqrt {1+x}-\text {Subst}\left (\int \frac {1}{\sqrt {1+x^2}} \, dx,x,\sqrt {x}\right )\\ &=\sqrt {x} \sqrt {1+x}-\sinh ^{-1}\left (\sqrt {x}\right )\\ \end {align*}

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Mathematica [B] Leaf count is larger than twice the leaf count of optimal. \(48\) vs. \(2(22)=44\).
time = 0.00, size = 48, normalized size = 2.18 \begin {gather*} \frac {\sqrt {\frac {x}{1+x}} \left (\sqrt {x} (1+x)-\sqrt {1+x} \tanh ^{-1}\left (\sqrt {\frac {x}{1+x}}\right )\right )}{\sqrt {x}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Sqrt[x/(1 + x)],x]

[Out]

(Sqrt[x/(1 + x)]*(Sqrt[x]*(1 + x) - Sqrt[1 + x]*ArcTanh[Sqrt[x/(1 + x)]]))/Sqrt[x]

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Maple [B] Leaf count of result is larger than twice the leaf count of optimal. \(44\) vs. \(2(16)=32\).
time = 0.06, size = 45, normalized size = 2.05

method	result	size
default	\(\frac {\sqrt {\frac {x}{1+x}}\, \left (1+x \right ) \left (2 \sqrt {x^{2}+x}-\ln \left (x +\frac {1}{2}+\sqrt {x^{2}+x}\right )\right )}{2 \sqrt {x \left (1+x \right )}}\)	\(45\)
risch	\(\left (1+x \right ) \sqrt {\frac {x}{1+x}}-\frac {\ln \left (x +\frac {1}{2}+\sqrt {x^{2}+x}\right ) \sqrt {\frac {x}{1+x}}\, \sqrt {x \left (1+x \right )}}{2 x}\)	\(47\)
trager	\(2 \left (\frac {1}{2}+\frac {x}{2}\right ) \sqrt {\frac {x}{1+x}}+\frac {\ln \left (2 \sqrt {\frac {x}{1+x}}\, x +2 \sqrt {\frac {x}{1+x}}-2 x -1\right )}{2}\)	\(49\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*(x/(1+x))^(1/2)*(1+x)*(2*(x^2+x)^(1/2)-ln(x+1/2+(x^2+x)^(1/2)))/(x*(1+x))^(1/2)

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Maxima [B] Leaf count of result is larger than twice the leaf count of optimal. 51 vs. \(2 (16) = 32\).
time = 0.27, size = 51, normalized size = 2.32 \begin {gather*} -\frac {\sqrt {\frac {x}{x + 1}}}{\frac {x}{x + 1} - 1} - \frac {1}{2} \, \log \left (\sqrt {\frac {x}{x + 1}} + 1\right ) + \frac {1}{2} \, \log \left (\sqrt {\frac {x}{x + 1}} - 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-sqrt(x/(x + 1))/(x/(x + 1) - 1) - 1/2*log(sqrt(x/(x + 1)) + 1) + 1/2*log(sqrt(x/(x + 1)) - 1)

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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 42 vs. \(2 (16) = 32\).
time = 0.33, size = 42, normalized size = 1.91 \begin {gather*} {\left (x + 1\right )} \sqrt {\frac {x}{x + 1}} - \frac {1}{2} \, \log \left (\sqrt {\frac {x}{x + 1}} + 1\right ) + \frac {1}{2} \, \log \left (\sqrt {\frac {x}{x + 1}} - 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

(x + 1)*sqrt(x/(x + 1)) - 1/2*log(sqrt(x/(x + 1)) + 1) + 1/2*log(sqrt(x/(x + 1)) - 1)

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \sqrt {\frac {x}{x + 1}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(sqrt(x/(x + 1)), x)

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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 35 vs. \(2 (16) = 32\).
time = 2.19, size = 35, normalized size = 1.59 \begin {gather*} \frac {1}{2} \, \log \left ({\left | -2 \, x + 2 \, \sqrt {x^{2} + x} - 1 \right |}\right ) \mathrm {sgn}\left (x + 1\right ) + \sqrt {x^{2} + x} \mathrm {sgn}\left (x + 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*log(abs(-2*x + 2*sqrt(x^2 + x) - 1))*sgn(x + 1) + sqrt(x^2 + x)*sgn(x + 1)

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Mupad [B]
time = 3.12, size = 35, normalized size = 1.59 \begin {gather*} -\mathrm {atanh}\left (\sqrt {\frac {x}{x+1}}\right )-\frac {\sqrt {\frac {x}{x+1}}}{\frac {x}{x+1}-1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x/(x + 1))^(1/2),x)

[Out]

- atanh((x/(x + 1))^(1/2)) - (x/(x + 1))^(1/2)/(x/(x + 1) - 1)

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