Question Number 172008 by Mikenice last updated on 23/Jun/22
$${solve}: \\ $$$$\mathrm{15}\left(\mathrm{2}{n}\right)_{{C}_{\left({n}ā\mathrm{1}\right)} } =\mathrm{28}\left(\mathrm{2}{n}ā\mathrm{1}\right)_{{C}_{{n}} } .\:{find}\:{n} \\ $$
solve-15-2n-C-n-1-28-2n-1-C-n-find-n-