Question Number 11343 by jaskaurrangerleader@gmail.com last updated on 21/Mar/17
$${n}_{\boldsymbol{\mathrm{c}}_{\boldsymbol{\mathrm{n}}} } =\frac{{n}\mathrm{1}}{\left({n}−{n}\right)} \\ $$
Commented by FilupS last updated on 21/Mar/17
$$\frac{{n}}{{n}−{n}}=\mathrm{undefined} \\ $$