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## Homework Statement

a = 0.00083 ± 0.00002m

what is 1/a with error

## Homework Equations

rules for combining errors

z = xy or z=x/y σ(z) = [σ(x)]

^{2}[σ(y)]

^{2}

## The Attempt at a Solution

I tried doing 1/a ± 1/error

but the error gets too big... is there a rule for this kind of situation?