Ononot — In an AP, Sn = An^2 + Bn. If S2 = 12 and S3 = 27, find the 1

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Arithmetic Sequenceshard

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In an AP, $S_n = An^2 + Bn$ . If $S_2 = 12$ and $S_3 = 27$ , find the $10^{th}$ term $a_{10}$ .