How do I calculate these Uncertainties?

[Procrastinate]

Okay, so I have this equation:

F = F₁ + F₂ - dF₁F₂

Anyways, I have the uncertainties for F₁ and F₂, how would I go about getting the uncertainty for F?

Do I just simply add the uncertainties or do I use the formula deltaF₁/F₁ +deltaF₂/F₂ = deltaF/F?

Thanks for your help.

 

[gneill]

First find the uncertainty in the product term using the appropriate rule for multiplication then treat that partial result as a new value with its own uncertainty. Use the rule for addition/subtraction when you sum the remaining values.