# Is 1, 3, 9, 27, 81 a geometric sequence?

##### 1 Answer

Mar 3, 2018

Yes, it has common ratio

#### Explanation:

Given:

#1, 3, 9, 27, 81#

Note that:

#3/1 = 9/3 = 27/9 = 81/27 = 3#

That is, there is a common ratio between successive terms.

So this is a geometric sequence.