The order of error of a numerical method

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SUMMARY

The discussion focuses on determining the order of error for the numerical method defined by the equation f''(x_i + \frac{h}{2}) \simeq \frac{\Delta^2 f_i}{h^2}. Participants referenced Taylor's theorem and Newton's interpolation polynomial as foundational concepts. The solution was achieved by applying Taylor's expansion effectively at the specified points. This highlights the importance of understanding Taylor's theorem in analyzing numerical methods.

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Homework Statement



Find the order of error of this numerical method:

f''(x_i+\frac{h}{2})\simeq \frac{\Delta ^2f_i}{h^2}

Homework Equations



Taylor's theorem, Newton's interpolation polynomial and its error.

The Attempt at a Solution



I started from Taylor's expansion at x_i and x_i+1 but didn't get anywhere.
 
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