Arithmetic Mean

Arithmetic Mean

## Definition / Concept

The arithmetic mean between two numbers is the number that makes the three numbers an AP.

## Formula

If $$a$$ is the arithmetic mean between $x$ and $y$:

$$A=\frac{x+y}{2}$$

Therefore:

$$x,A,y$$

are in AP.

## Usage

- Used to insert arithmetic means between given numbers and establish AP relations.