Question Number 131283 by SEKRET last updated on 03/Feb/21
$$\:\int_{\mathrm{0}} ^{+\infty} \:\frac{\mathrm{1}}{\boldsymbol{\mathrm{e}}^{\boldsymbol{\mathrm{x}}} \centerdot\boldsymbol{\mathrm{ln}}\left(\boldsymbol{\mathrm{x}}\right)}\:\boldsymbol{\mathrm{dx}}=? \\ $$$$ \\ $$$$ \\ $$