What is the 84th term of the arithmetic sequence? −1286,−1269,−1252,−1235,−1218,...
Use the nth term fotmula to find the 84th term:
Nth term = F + D*(N - 1), where F=First term, D= Common difference, N=the nth term
= -1286 + 17*(84 - 1)
= -1286 + 17*83
= -1286 + 1,411
The 84th term = 125
