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Homework Help: Identify the singularity

  1. Mar 22, 2008 #1
    1. The problem statement, all variables and given/known data

    Identify the singularity of f(z)= 1-e^z/1+e^z at z= infinity

    2. Relevant equations

    3. The attempt at a solution

    How shud i start
  2. jcsd
  3. Mar 22, 2008 #2


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    Science Advisor
    Homework Helper

    You can convert the singularity at infinity to one at zero by considering
    [itex]g(z) = f(1 / z)[/itex]
    Then apply the same strategy as here
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