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# If the sum of the first n terms of an AP is 1/2 (3n^2+7n),then find its nth term. Hence write its 20th term.​   ### Another question on Mathematics Mathematics, 21.06.2019 16:40
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If the sum of the first n terms of an AP is 1/2 (3n^2+7n),then find its nth term. Hence write its 20...
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