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What is the finite expansion of a function means ?

  1. Feb 1, 2015 #1
    i know the rules of finite expansion but i just want to know why do we need it and what does it mean ?
  2. jcsd
  3. Feb 1, 2015 #2

    Stephen Tashi

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    Science Advisor

    The phrase "finite expansion" isn't specific. Can you give an example?
  4. Feb 2, 2015 #3
    If you're referring to the Taylor expansion, this site provides several good reasons and examples. The reasons they list are approximations of all sorts, series solutions of differential equations, and limiting values.
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