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Homework Help: Discrete-time Fourier Analysis

  1. Sep 9, 2006 #1
    I am trying to compute the DTFT of x[n]=n(.5)^n u[n].

    This is my work so far.

    Is this correct?
  2. jcsd
  3. Sep 11, 2006 #2
    I see that this topic totally stumps everyone! LOL

    I have solved ths with an answer of

    0.5 e^(-jw)/((1-0.5e^(-jw))^2)
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