# Question #1abf2

##### 1 Answer

Jan 1, 2018

There are two correct answers; a & c.

#### Explanation:

Arithmetic sequences are those whose terms have a common difference across all of the terms in the sequence and can be expressed using the following recursive definition:

Where the first term is equal to

Option a can be expressed as follows:

Option c can be expressed as follows:

Hence both are arithmetic sequences (the other two options are geometric sequences with common ratios of 4 and 0.25 respectively)

Hope that helps :)