3.130 \(\int \frac{1}{\sqrt{9+x^2}} \, dx\)

Optimal. Leaf size=6 \[ \sinh ^{-1}\left (\frac{x}{3}\right ) \]

[Out]

ArcSinh[x/3]

_______________________________________________________________________________________

Rubi [A]  time = 0.00408074, antiderivative size = 6, normalized size of antiderivative = 1., number of steps used = 1, number of rules used = 1, integrand size = 9, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.111 \[ \sinh ^{-1}\left (\frac{x}{3}\right ) \]

Antiderivative was successfully verified.

[In]  Int[1/Sqrt[9 + x^2],x]

[Out]

ArcSinh[x/3]

_______________________________________________________________________________________

Rubi in Sympy [A]  time = 0.497259, size = 3, normalized size = 0.5 \[ \operatorname{asinh}{\left (\frac{x}{3} \right )} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  rubi_integrate(1/(x**2+9)**(1/2),x)

[Out]

asinh(x/3)

_______________________________________________________________________________________

Mathematica [A]  time = 0.00556258, size = 6, normalized size = 1. \[ \sinh ^{-1}\left (\frac{x}{3}\right ) \]

Antiderivative was successfully verified.

[In]  Integrate[1/Sqrt[9 + x^2],x]

[Out]

ArcSinh[x/3]

_______________________________________________________________________________________

Maple [A]  time = 0.004, size = 5, normalized size = 0.8 \[{\it Arcsinh} \left ({\frac{x}{3}} \right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  int(1/(x^2+9)^(1/2),x)

[Out]

arcsinh(1/3*x)

_______________________________________________________________________________________

Maxima [A]  time = 1.48957, size = 5, normalized size = 0.83 \[ \operatorname{arsinh}\left (\frac{1}{3} \, x\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(1/sqrt(x^2 + 9),x, algorithm="maxima")

[Out]

arcsinh(1/3*x)

_______________________________________________________________________________________

Fricas [A]  time = 0.199918, size = 19, normalized size = 3.17 \[ -\log \left (-x + \sqrt{x^{2} + 9}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(1/sqrt(x^2 + 9),x, algorithm="fricas")

[Out]

-log(-x + sqrt(x^2 + 9))

_______________________________________________________________________________________

Sympy [A]  time = 0.158328, size = 3, normalized size = 0.5 \[ \operatorname{asinh}{\left (\frac{x}{3} \right )} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(1/(x**2+9)**(1/2),x)

[Out]

asinh(x/3)

_______________________________________________________________________________________

GIAC/XCAS [A]  time = 0.210534, size = 19, normalized size = 3.17 \[ -{\rm ln}\left (-x + \sqrt{x^{2} + 9}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(1/sqrt(x^2 + 9),x, algorithm="giac")

[Out]

-ln(-x + sqrt(x^2 + 9))