Use Mathematical Induction to Prove the Given Statement for All $$16 + 12 + 8 + \ldots + ( - 4 \mathrm { k } + 20 ) = - 2 n ( n - 9 )$$

Short Answer

Use mathematical induction to prove the given statement for all positive integers n.
- $$16 + 12 + 8 + \ldots + ( - 4 \mathrm { k } + 20 ) = - 2 n ( n - 9 )$$