tn = 2x2 + 3 where x = 1, 2, 3, ...
75
It is: 27-2n
A single number, such as 1521273339 does not define a sequence. There is no nth term for a signle number.
It is 5n-4 and so the next term will be 21
5n+1
10n + 1
81
The given sequence (7, 14, 21, 28, 35,....) is an arithmetic sequence where each term increases by 7. The nth term of the given sequence is 7n
The nth term is 25-4n and so the next term will be 5
It is 4n+5 and so the next term will be 25
Clearly here the nth term isn't n25.
It is: 27-2n
A single number, such as 1521273339 does not define a sequence. There is no nth term for a signle number.
It is 5n-4 and so the next term will be 21
5n+1
after -9 it is -15 then -21, -27 and the ninth is -36
10n + 1
1st term= 3 2nd term = 5 Nth term = 2n+1 10th term= 21 = 2(10)+1