Finite difference - Wikipedia
https://en.wikipedia.org/wiki/Finite_differenceIn an analogous way, one can obtain finite difference approximations to higher order derivatives and differential operators. For example, by using the above central difference formula for f ′(x + h/2) and f ′(x − h/2) and applying a central difference formula for the derivative of f ′ at x, we obtain the central difference approximation of the second derivative of f: Second-order central
(PDF) Numerical Methods UNIT – IV Numerical Differentiation
https://www.researchgate.net › ... › Numerical Methodsxi ( = x0 + ih ), i = 0, 1, 2,...., n. ... Derivatives using Newton's Forward Difference Formula: Suppose that we are given a set of values (xi, yi), i = 0,1,2,..