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let-f-x-x-arctan-1-e-x-developp-f-at-intrgr-serie-




Question Number 34864 by a.i msup by abdo last updated on 12/May/18
let f(x)=x arctan(1+e^(−x) )  developp f at intrgr serie .
$${let}\:{f}\left({x}\right)={x}\:{arctan}\left(\mathrm{1}+{e}^{−{x}} \right) \\ $$$${developp}\:{f}\:{at}\:{intrgr}\:{serie}\:. \\ $$

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