calculate-by-two-methods-0-0-dxdy-1-y-1-x-2-y-then-find-the-value-of-0-lnx-1-x-2-dx-

Question Number 31082 by abdo imad last updated on 02/Mar/18

c a l c u l a t e b y t w o m e t h o d s \int_{0}^{\infty} \int_{0}^{\infty} \frac{d x d y}{(1 + y) (1 + x^{2} y)}

t h e n f i n d t h e v a l u e o f \int_{0}^{\infty} \frac{l n x}{1 - x^{2}} d x .