Question Number 139422 by 676597498 last updated on 26/Apr/21
$${C}_{{n}} ^{\:\mathrm{2}} =\frac{\mathrm{1}}{\mathrm{8}}{P}_{{n}\:} ^{\:\mathrm{8}} \\ $$$${find}\:{n} \\ $$
Commented by mohammad17 last updated on 27/Apr/21
$${can}\:{not}\:{find}\:{value}\:{of}\:{n}\:{in}\:{this}\:{form} \\ $$$${i}\:{think}\:{C}_{\mathrm{2}} ^{\:{n}} =\frac{\mathrm{1}}{\mathrm{8}}{P}_{{n}} ^{\:\mathrm{8}} \\ $$