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Taylor's theorem for multivariable functions

  1. Apr 9, 2013 #1

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  2. jcsd
  3. Apr 9, 2013 #2


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    To get the total change you need terms that represent x and y changing together.
    That leads to the term you asked about: ∂²f/∂x∂y
  4. Apr 9, 2013 #3
    Thank you
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