I'm trying to get an intuitive sense for errors and picked some random numbers:(adsbygoogle = window.adsbygoogle || []).push({});

x = 2.5 +/- 0.01

find f(x) = x³

d f(x) / dx = 3x²

d f(x) = 3x² dx

= 3(2.5)² 0.01

= 0.1875

What I don't get is why f(x - Δx) ≠ f(x) - 0.1875 and why f(x + Δx) ≠ f(x) + 0.1875

Where did I go wrong in my method for finding the uncertainty value? Thanks

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# Propagation of Error/Uncertainty

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