Newton's Forward Difference Formula
math.iitm.ac.in › public_html › sryedidaThe formula is called Newton's (Newton-Gregory) forward interpolation formula. So if we know the forward difference values of f at x 0 until order n then the above formula is very easy to use to find the function values of f at any non-tabulated value of x in the internal [a,b].The higher order forward differences can be obtained by making use of forward difference table.