the anser is that you are stupid
10n + 1
A single number, such as 1521273339 does not define a sequence. There is no nth term for a signle number.
1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2
nth term = 5 +8n
(n^2+n)/2
the anser is that you are stupid
after -9 it is -15 then -21, -27 and the ninth is -36
10n + 1
(1+n) x n/2 or (n + n2)/2
A single number, such as 1521273339 does not define a sequence. There is no nth term for a signle number.
1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2
nth term = 5 +8n
The nth term is 25-4n and so the next term will be 5
f = 10n + (n - 1)^2 For n=10 f = 10(10) + (10 - 1)^2 f = 181
It is 4n+5 and so the next term will be 25
1st term= 3 2nd term = 5 Nth term = 2n+1 10th term= 21 = 2(10)+1