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Complex analysis

  1. Jan 4, 2009 #1
    1. The problem statement, all variables and given/known data

    Hey guys.
    Look at this question please.
    I have two paths, and I need to proof the thing in red.
    They give a tip due, they say to show first that the equation in green is correct and then using Taylor development, to proof the red equation.
    I'm still in the first phase, in the green equation. I know it got something to do with Cauchy's integral formula but I cant see how...:confused:
    Any idea guys?

    Thanks a lot.

    2. Relevant equations



    3. The attempt at a solution
     

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