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let-f-n-x-1-n-ln-1-x-2-n-1-x-2-and-f-x-f-n-x-find-lim-x-f-x-

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Question Number 45961 by maxmathsup by imad last updated on 19/Oct/18
let f_n (x)=(−1)^n ln(1+(x^2 /(n(1+x^2 )))) and f(x)=Σ f_n (x) find lim_(x→+∞) f(x).
letfn(x)=(−1)nln(1+x2n(1+x2))andf(x)=Σfn(x)findlimx→+∞f(x).

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