17. A function f(x, y) continuous in a region of the plane D will be called a density function of probability if f(x, y) ≥ 0 for all (x, y) E D and ₁ f(x,y) dA= 1. f(x,y)= a 1+z²+ Find the value of a so that the function be a density function of probability on the disk 0 ≤ r ≤1000.

Q: メ~U(-4,8) 8-18-2(x-u nd the density of Y b) x Ý~ U (0,1) inde penden %3D

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