Question: Find a formula for an for the arithmetic sequence. 1. a1 = 1, d = 3 2. a1 = 15, d = 4 3. a1

Find a formula for an for the arithmetic sequence.
1. a1 = 1, d = 3
2. a1 = 15, d = 4
3. a1 = 100, d = −8

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