For this case we have the following definition:
An arithmetic sequence is a sequence of numbers that increases or decreases by a constant amount each term.
Thus, to obtain
it is necessary to subtract
from the amount of
.
To obtain
it is necessary to subtract
the amount of
.
As it is observed, a constant quantity is not diminished since
is not equal
.
So, the sequence is not arithmetic
Answer:
The sequence is not arithmetic