2. The function f(x) is discretized using an equidistant grid with step h. It is known that f(0) = 1, f(h) = 2 and f(2h) = 1. (a) Determine h, if the central difference approximation to the second derivative at r = h is f" (h) = -2. (b) Determine the most accurate approximation to f'(h). Give the name of the approximation.

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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