If the sum of first nth terms of an ap is 3n^2-2n. Find the A.P. and its 18th terms.

If the sum of first nth terms of an ap is 3n^2-2n. Find the A.P. and i

1.	If the sum of first nth terms of an ap is 3n^2-2n. Find the A.P. and its 18th terms.
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