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In an A.P:() Given a = 2, d = 8, Sn = 90, find n and an(ii) Given a = 8, a= 62, Sn = 210, find n and d.(iii) Given a = 4, d = 2, S. =-14, find n and a.(iv) Given a = 3, n = 8, S = 192, find d.(v) Given I = 28, S = 144, and there are total 9 items. Find a.

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