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Dec 10, 2020 at 22:16 comment added ACR I think that could be the origin of why mid-point is usually suggested. Can we generalize this concept for higher derivatives? For example, if we have the second derivative, we have N-2 calculated derivatives for N- x-coordinates.
Dec 10, 2020 at 22:06 history answered Federico Poloni CC BY-SA 4.0