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The sum of the first n term sofa an AP is (3n^2/2 + 5n/2). Find its nth term and the 25th term.

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The sum of the first n term sofa an AP is (3n2/2 + 5n/2). Find its nth term and the 25th term.

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Let Sn denotes the sum of first n terms of the AP.

Hence, the nth term is (3n+1) and 25th term is 76. 

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