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Homework Help: Simple substitution problem

  1. Dec 8, 2009 #1
  2. jcsd
  3. Dec 8, 2009 #2


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    Welcome to PF!

    Hi estu2! Welcome to PF! :smile:

    Use the product rule, togeether with ∂X/∂t = 0, and ∂T/∂x = 0.

    Then just divide throughout by XT. :wink:
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