The β function is defined by
| β(x,y)= | ∫ | 
 | tx−1 (1−t)y−1= | 
 | . | 
This is defined for x and y positive reals (to ensure the convergence of the integral) and by extension for x and y if they are not negative integers. Notably, β(1,1)=1, β(n,1)=1/n and β(n,2)=1/n(n+1).
The Beta command computes the β function.
| Beta(5,2) | 
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| Beta(x,y) | 
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| Beta(5.1,2.2) | 
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