A particular finite difference approximation for the first derivative of a function is -f(x+3)+9f(x+1)-8f(x;) f'(x₁) = 6h where the points are all equally spaced with a step size h. What is the order of the truncation error? Hint: use the Taylor series expansions for f(x+3) and f(x₁+₁).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section: Chapter Questions
Problem 5T
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A particular finite difference approximation for the first derivative of a function is
f'(x) =
-f(x+3)+9f(x₁₁)-8f(x)
6h
where the points are all equally spaced with a step size h. What is the order of the truncation error?
Hint: use the Taylor series expansions for f(x+3) and ƒ(x₁+1).
Transcribed Image Text:A particular finite difference approximation for the first derivative of a function is f'(x) = -f(x+3)+9f(x₁₁)-8f(x) 6h where the points are all equally spaced with a step size h. What is the order of the truncation error? Hint: use the Taylor series expansions for f(x+3) and ƒ(x₁+1).
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