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Question Number 197465 by universe last updated on 18/Sep/23
   find the sum   (1/(x+1))+(2/(x^2 +1))+(4/(x^4 +1))+.........+(2^n /(x^(2n) +1))  = ??
$$\:\:\:\mathrm{find}\:\mathrm{the}\:\mathrm{sum} \\ $$$$\:\frac{\mathrm{1}}{{x}+\mathrm{1}}+\frac{\mathrm{2}}{{x}^{\mathrm{2}} +\mathrm{1}}+\frac{\mathrm{4}}{{x}^{\mathrm{4}} +\mathrm{1}}+………+\frac{\mathrm{2}^{{n}} }{{x}^{\mathrm{2}{n}} +\mathrm{1}}\:\:=\:?? \\ $$

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