arithmetic sequence
step-by-step explanation:
given that a sequence has terms as
19, 15, 11,
this is represented on a graph
the pattern indicates that the sequence is an arithmetic sequence with i term
a=19 and common difference d =-4
any general term
thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is
24-5n.
first negative term would start after 5th term
5th term =24-25< 0
from 5th term onwards the sequence would be negative.