Question Number 182909 by SANOGO last updated on 16/Dec/22 | ||
$$\left.{x}\epsilon\right]−\mathrm{1},\mathrm{1}\left[\:{calcul}:\right. \\ $$$$\underset{{n}=\mathrm{1}} {\overset{+{oo}} {\sum}}\frac{{x}^{{n}} }{\left(\mathrm{1}−{x}^{{n}} \right)\left(\mathrm{1}−{x}^{{n}+\mathrm{1}} \right)} \\ $$ | ||