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Homework Help: Evaluate the integral using substitution

  1. Apr 20, 2010 #1
    1. Evaluate the integral [0,ln(3)] of ff(x)=(e^2x + 1)^2 /e^x



    I am having trouble locating what to substitute.
     
  2. jcsd
  3. Apr 20, 2010 #2

    Mark44

    Staff: Mentor

    No need for a substitution. Just expand (e2x + 1)2 and divide each term by ex.
     
  4. Apr 20, 2010 #3
    Last edited: Apr 20, 2010
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