Question Number 196918 by cortano12 last updated on 03/Sep/23
Answered by MM42 last updated on 03/Sep/23
$${a}_{{n}} =\frac{\mathrm{1}}{\mathrm{2}}\left(\mathrm{5}×\mathrm{3}^{{n}−\mathrm{1}} −\mathrm{1}\right)\:\checkmark \\ $$
Question-196918