Calculate the error propagation for the theoretical effective spring constant for the two springs. The actual values don't matter, it's just supposed to show how it would be calculated.
The Attempt at a Solution
ke=A*B/(A+B) (Let A=k1, B=k2)
I have come up with two possibilities, but I'm not sure if either is correct. The addition in the denominator is confusing me.
Possibility 1: σ(ke)/|ke|=σ(A)/|A| + σ(B)/|B| + σ(A) +σ(B)
Possibility 2: σ(ke)/|ke|=σ(A)/|A| + σ(B)/|B| + (σ(A) +σ(B))/|A+B|