Is the following sequence arithmetic? If so, identify the common difference. 2.9, 2.7, 2.5, 2.3, . . .

yes, 2
yes, -0.2
no
yes, 0.3

1 Answer
Apr 14, 2017

Answer:

It is an arithmetic sequence with common difference #-0.2#.

Explanation:

In an arithmetic sequence, difference between a term and it's immediately preceding term is always constant and is known as common difference.

Here, #2.7-2.9=-0.2#

#2.5-2.7=-0.2# and

#2.3-2.5=-0.2#

As the difference is constantly #-0.2#,

It is an arithmetic sequence with common difference #-0.2#.