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Question Number 59161 by maxmathsup by imad last updated on 05/May/19

c a l c u l a t e f (a) = \int_{0}^{\infty} \frac{l n (a^{2} + x^{2})}{a^{2} + x^{2}} d x w i t h > 0

1) c a l c u l a t e \int_{0}^{\infty} \frac{l n (2 + x^{2})}{2 + x^{2}} d x a n d \int_{0}^{\infty} \frac{l n (3 + x^{2})}{3 + x^{2}} d x .