Question Number 211345 by a.lgnaoui last updated on 06/Sep/24
$$\mathrm{E}\boldsymbol{\mathrm{valuer}}:\:\:\frac{\boldsymbol{\mathrm{R}}}{\boldsymbol{\mathrm{r}}\mathrm{1}+\boldsymbol{\mathrm{r}}\mathrm{2}} \\ $$
Commented by a.lgnaoui last updated on 06/Sep/24
