Use mathematical induction to prove the statement is true for every positive integer n 3 6 9 1 2 3 n 3 n ( n 1 ) 2

Question

Use mathematical induction to prove the statement is true for every positive integer n   3   6   9   1 2           3 n   3 n ( n   1 )   2

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Use mathematical induction to prove the statement is true for every positive integer n . 3 + 6 + 9 + 1 2 + .