# Is 5, 10, 20, 40, 80, 160 a geometric sequence?

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Yes it is.

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To see if a sequence is geometric you have to check if every term (except the first) can be calculated by multiplying the previous term by the same constant.

In this case it is true. All terms are formed by multiplying previous one by

The sequence can be written as:

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Yes, geometric!

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In a geometric sequence, each term is multiplied by the same number to get to the next term. This number is called the common ratio and is denoted by

To check whether a sequence is geometric, find

If

In general terms,

In this case,

Yes, geometric! with

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