2.12 + 42 + 72 + + (3n - 2)2 = quantity n times quantity six n squared minus three n minus one all divided by two

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false.
 
2.12 + 42 + 72 + ... + (3n - 2)2 = quantity n times quantity six n squared minus three n minus one all divided by two.

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