# Definition:Term of Sequence

## Definition

The elements of a sequence are known as its **terms**.

Let $\left \langle{x_n}\right \rangle$ be a sequence.

Then the **$k$th term** of $\left \langle{x_n}\right \rangle$ is the ordered pair $\left({k, x_k}\right)$.

## Also defined as

Some sources gloss over the fact that a sequence is a mapping and define the terms to be the elements of the range of the sequence:

*We call $x_n$ the*$n$th term*of the sequence.*- -- 1977: K.G. Binmore:
*Mathematical Analysis: A Straightforward Approach*: $\S 4.2$

- -- 1977: K.G. Binmore:

However, this simplistic treatment lacks the precision of the definition provided here, and $\mathsf{Pr} \infty \mathsf{fWiki}$ does not use it.

## Also known as

A **term of a sequence** is referred to in some sources as an **element of the sequence**.

## Sources

- 1971: Robert H. Kasriel:
*Undergraduate Topology*... (previous) ... (next): $\S 1.15$: Sequences: Definition $15.2$ - 1977: K.G. Binmore:
*Mathematical Analysis: A Straightforward Approach*... (previous) ... (next): $\S 4.2$: Sequences - 1992: Larry C. Andrews:
*Special Functions of Mathematics for Engineers*... (previous) ... (next): $\S 1.2$: Infinite Series of Constants