Question Number 161163 by peter frank last updated on 13/Dec/21
Answered by nikif99 last updated on 15/Dec/21
$${n}={p}+{q}−\mathrm{2} \\ $$$$ \\ $$
Commented by nikif99 last updated on 15/Dec/21
Commented by nikif99 last updated on 15/Dec/21
