Question: 7. In an arithmetic sequence, the 15' term is 48 and the 401 term is 223. Determine a, cl and the general formula. [5]

7. In an arithmetic sequence, the 15'\" term is 48 and

7. In an arithmetic sequence, the 15'\" term is 48 and the 401\" term is 223. Determine a, cl and the general formula. [5]

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