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Find an for each arithmetic sequence

1. a1 = 7, d=3, n = 11
2. a1 = 12, d = 3, n = 24
3. a1 = 20, d = 5, n = 30
4. a1 = 50, d = -8, n = 10
5. a1 = 14, d = -3, n = 25

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