The "N"th term is -7. You can deduce this from: 19 - 7 = 12 - 7 = 5 - 7 = -2 - 7 = -9
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Expressed in terms of n, the nth term is equal to 7n - 2.
The nth term is (2n - 12).
12 - 5(n-1)
The sequence has a difference of 10, so the nth term starts with 10n. Then to get to -8 from 10 you need to subtract 18. So the nth term is 10n - 18.
5n+2