calculate-A-n-1-n-n-e-x-2-y-2-x-2-y-2-3-dxdy-and-lim-n-A-n-

Question Number 133120 by abdomsup last updated on 19/Feb/21

c a l c u l a t e A_{n} = \int \int_{[\frac{1}{n}, n [} \frac{e^{- x^{2} - y^{2}}}{\sqrt{x^{2} + y^{2} + 3}} d x d y

a n d {l i m}_{n \to \infty} A_{n}