Deriving absolute error equation

[AcecA]

Homework Statement

I need to derive an error equation from the following equation...
\frac{e}{m} = \frac{2V}{B^{2}R^{2}}

Homework Equations

Just... basic... derivation rules...

The Attempt at a Solution

I did try, just don't know how to put the stupid attempt in LaTeX...

I'm stuck at the "2V" part because, in our package, there is no description on how to deal with constants. And I was told to treat \frac{e}{m} as a single variable. Thanks, guys :)

 

[LowlyPion]

Homework Statement

I need to derive an error equation from the following equation...
\frac{e}{m} = \frac{2V}{B^{2}R^{2}}

Homework Equations

Just... basic... derivation rules...

The Attempt at a Solution

I did try, just don't know how to put the stupid attempt in LaTeX...

I'm stuck at the "2V" part because, in our package, there is no description on how to deal with constants. And I was told to treat \frac{e}{m} as a single variable. Thanks, guys :)

If you are dealing with error propagation then where you are multiplying by a constant you add its relative error like anything else ... but of course it's relative error or absolute error for that matter is necessarily 0.

 

[AcecA]

Okie. Now I feel stupid at not realizing something so simple. Thanks :)