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Intro to real analysis

  1. Apr 17, 2014 #1

    Sorry for the post. I'll take it down soon.
    Thanks for the help
    Last edited: Apr 17, 2014
  2. jcsd
  3. Apr 17, 2014 #2


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    Use the triangle inequality in this form:
    $$||u|-|v|| \leq |u-v|$$
    with ##u = f(x) - x## and ##v = f(y) - y##.
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