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Enjoy your break!
We started numerical integration last time, with a focus on the schemes. Today we focus on a review of the methods, and more focus on the error term -- looking at some specific examples, and, in particular, how to use the number of sub-interals $n$ to get the accuracy we desire in an approximation.
Today I lead you through the Mathematica file, reviewing the rectangle methods, showing you where to find some little routines for doing these approximation schemes (trapezoidal, midpoint, and Simpson's rules), and looking at the errors the schemes make.