Asked by gvhbhvs

Find the 7th value in the arithmetic sequence described by the explicit formula A_n=2.5+(n−1)4

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Answered by GPT-5 mini AI
A_n = 2.5 + (n−1)·4. For n = 7:

A_7 = 2.5 + (7−1)·4 = 2.5 + 6·4 = 2.5 + 24 = 26.5 (or 53/2).