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Error bounds with approximated M value

  1. Apr 1, 2007 #1
    How do you approximate the value 'M' for the error bound formula for the Trapezoid Rule of a function that the derivative cannot be found?

    Error Bound Formula: http://archives.math.utk.edu/visual.calculus/4/approx.2/index.html

    I'm trying to figure out the value of n to get erf(1.00) approximated within the error of 0.001?

    Error Function: http://en.wikipedia.org/wiki/Error_function

    How do i get M(in the error bound formula) when it is not possible to get the second derivative of the error function?
  2. jcsd
  3. Apr 1, 2007 #2
    But it IS possible to get the second derivative of erf.
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