(n^2+n)/2
after -9 it is -15 then -21, -27 and the ninth is -36
f = 10n + (n - 1)^2 For n=10 f = 10(10) + (10 - 1)^2 f = 181
To find the nth term of this sequence, we first need to determine the pattern or rule governing the sequence. By examining the differences between consecutive terms, we can see that the sequence is increasing by 9, 15, 21, 27, and so on. This indicates that the nth term is given by the formula n^2 + 1.
The Series has the formula 3n + 1/2(n - 1)(n - 2) = 3n + 1/2(n2 - 3n + 2) which simplifies to, 1/2(n2 +3n + 2)
(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