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Uncertainty of the function? My answer is a bit different

  1. May 15, 2017 #1
    1. The problem statement, all variables and given/known data

    56760ebb5b.png
    2. Relevant equations


    3. The attempt at a solution
    c31264e876.png
    The answer is different though,
    0c178a05f4.png
     
  2. jcsd
  3. May 16, 2017 #2

    haruspex

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    Does it not strike you as odd that you divided δz by z but did not divide δx+δy by anything?
    Check your formula.
     
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