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How do I differentiate

  1. Mar 28, 2008 #1
    How do I differentiate

    f(x,t) = expi(kx-wt)

    f'(x,t) = ?
    f''(x,t) = ?
  2. jcsd
  3. Mar 28, 2008 #2


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    Staff Emeritus
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    What do your primes denote differentiation with respect to?

    Write your expression as exp(ikx).exp(-iwt). Depending upon what you are differentiating with respect to, one of these terms can be treated as a constant. You know how to differentiate exp(x), right?
  4. Mar 28, 2008 #3
    Does it make a difference if "i" is involved?
  5. Mar 28, 2008 #4
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