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Complex analysis question

  1. Nov 6, 2011 #1
    1. Let f(z) = (3e2z−ie-z)/(z2−1+i) . Find f′(1 + i).

    3. Should I sub (1+i) to z and then diff it by i.
    Or i need to diff it by z first then sub (1+i) in it at last?

  2. jcsd
  3. Nov 6, 2011 #2

    I like Serena

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    Homework Helper

    Welcome to PF, nickolas2730! :smile:

    You need to diff it by z first then sub (1+i) in it at last.

    Btw, you can't diff by "i". It is not a variable but a constant.
  4. Nov 6, 2011 #3
    thank you so much!!!
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