Definition:Vector Length/Real Number Line
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Example of Vector Length
Let $\mathbf v$ be a vector represented by an arrow on the real number line.
Let:
- the initial point of $\mathbf v$ be $a \in \R$
- the terminal point of $\mathbf v$ be $b \in \R$
The length of $\mathbf v$ is defined as:
- $\norm {\mathbf v} = \size {b - a}$
the absolute value of $b - a$.