(a) f(xi), f(xi+1) and f(x+2) are three data points of f(x) and equally spaced at x with the step size of h. Find two different forward difference approximations of the first derivative of f(x) by using the first two data points, i.e. f(xi) and ƒ(xi+1), and all the three data points, respectively, and evaluate the order of their truncation errors through error analysis.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
Section: Chapter Questions
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(a) f(xi), f(xi+1) and f(x+2) are three data points of f(x) and equally spaced at x with the step size of
h. Find two different forward difference approximations of the first derivative of f(x) by using
the first two data points, i.e. f(xi) and f(x₁+1), and all the three data points, respectively, and
evaluate the order of their truncation errors through error analysis.
Transcribed Image Text:(a) f(xi), f(xi+1) and f(x+2) are three data points of f(x) and equally spaced at x with the step size of h. Find two different forward difference approximations of the first derivative of f(x) by using the first two data points, i.e. f(xi) and f(x₁+1), and all the three data points, respectively, and evaluate the order of their truncation errors through error analysis.
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