Use mathematical induction to prove the statement is true for all positive integers n.
-$$3 + 2 \cdot 3 + 3 \cdot 3 + \ldots + 3 n = \frac { 3 n ( n + 1 ) } { 2 }$$

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The Answer of Use mathematical induction to prove the statement is true for all positive integers n.
-$$3 + 2 \cdot 3 + 3 \cdot 3 + \ldots + 3 n = \frac { 3 n ( n + 1 ) } { 2 }$$

Use Mathematical Induction to Prove the Statement Is True for All