BETA

Syntax:

BETA( a:Number, b:Number )

Returns the value of the beta function[1] for parameters a and b.

Formula:

One definition of the beta function is

Β(a, b) = Γ(a) ⋅ Γ(b) ∕ Γ(a + b)

This special function is actually evaluated by Fireworkz using the formula

Β(a, b) = EXP( GAMMALN(a) + GAMMALN(b) − GAMMALN(a + b) )

Revisions:

This function was added in 1.30.

  1. Weisstein, Eric W. "Beta Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BetaFunction.html