Question

Determine if the sequence below is arithmetic or geometric and determine the

common difference / ratio in simplest form.
125, 25, 5, ...
This is a geometric sequence and the common ratio
Submit Answer
is equal to
attempt 2 out of 2

Answer 1

This is a geometric sequence with a common ratio of 1/5.

To see why, divide any term by the previous term:

25 / 125 = 1/5

5 / 25 = 1/5

So each term is 1/5 of the previous term, which means the sequence is geometric with a common ratio of 1/5.

Answer 2

It is geometric and the common ratio is 1/5 or .2

Explanation:

It is geometric because it involves multiplication rather than addition.

25/125 = 1/5 or .2

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