round off error in central difference formula
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If the function f (x) can be evaluated at values that lie to the left and right of x, then
the best two-point formula will involve abscissas that are chosen symmetrically on both f
(x) ≈ f (x + h) − f (x − h)
2h sides of x.
the best two-point formula will involve abscissas that are chosen symmetrically on both f
(x) ≈ f (x + h) − f (x − h)
2h sides of x.
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