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Intergral of (e^(3/x))/(x^2) ?

  1. Nov 19, 2009 #1
    I know how to do a u substitution, but can it be applied to this equation?
     
  2. jcsd
  3. Nov 19, 2009 #2
    u=3/x
    du=-3dx/x^2

    -1/3 ∫e^u du

    etc.
     
  4. Nov 19, 2009 #3
    ah, thanks
     
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