The nth term is (2n - 12).
2n - 12
It is: 2n+4
The nth term of that series is (24 - 6n).
It is: nth term = -4n+14
If you mean: 6 12 18 24 then the nth term is 6n
The nth term is 18 -3n and so the next term will be 3
The nth term in this arithmetic sequence is an=26+(n-1)(-8).
24 - 6n