Putnam Math Competition 1982, A3, Solve Feynman's Trick arctan(pi x)-arctan(x)/x from 0 to infinity

Описание к видео Putnam Math Competition 1982, A3, Solve Feynman's Trick arctan(pi x)-arctan(x)/x from 0 to infinity

I solve this Putnam exam 1982, A3, by using Feynman's Technique, integral (arctan(pi x)-arctan(x))/x from 0 to infinity.
The Generalized Version:    • Putnam Exam 1982, A3, Modified integr...  

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