Use the Principle of Mathematical Induction to Prove That $$2 \mid \left( n ^ { 2 } + 3 n \right) \text { for all } n \geq 1$$

Short Answer

Use the Principle of Mathematical Induction to prove that $$2 \mid \left( n ^ { 2 } + 3 n \right) \text { for all } n \geq 1$$