# Arithmetic Sequence Formula

An arithmetic sequence has a common difference.

The **formula** for the n^{th} term is:

$$a_n\;=\;a\;+\;(n-1)d$$

**Where :**

**a _{n}** = n

^{th}term of the sequence

a = first term of the sequence

d = common difference

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An arithmetic sequence has a common difference.

The **formula** for the n^{th} term is:

$$a_n\;=\;a\;+\;(n-1)d$$

**Where :**

**a _{n}** = n

a = first term of the sequence

d = common difference