Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Soit $f:{\mathbb N}^* \longrightarrow {\mathbb N}^*$ une fonction telle que $f(1)=1$ et $f(x+y+xy)=x+y+f(xy)$. Déterminer $f(2017)$.

Looks like your connection to Expii Forum was lost, please wait while we try to reconnect.