This is a basic question. Distance is defined mathematically by the square root of the squared difference between a and b. Then what do the expressions a-b and Ia-bI (absolute value) mean?(Headbang)

Printable View

- Aug 8th 2009, 12:12 PMnonintegralDistance formula...which one is right?
This is a basic question. Distance is defined mathematically by the square root of the squared difference between a and b. Then what do the expressions a-b and Ia-bI (absolute value) mean?(Headbang)

- Aug 8th 2009, 12:25 PMPlato
The distance between

**two points**$\displaystyle a~\&~b$**on a number line**is $\displaystyle \left| {a - b} \right|$.

The distance between two**points in a plane**$\displaystyle (p,q)~\&~(r,s)$ is$\displaystyle \sqrt {\left( {p - r} \right)^2 + \left( {q - s} \right)^2 } $.

Does that help? - Aug 8th 2009, 12:57 PMnonintegral
- Aug 8th 2009, 01:03 PMPlato
- Aug 8th 2009, 01:14 PMnonintegral