1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding the antiderivative of a fractional prob

  1. Jan 16, 2009 #1
    I am suppose to evaluate this integral by using substitution

    I will be very thankful if someone were able to tell me a strategy in antiderivitating fractional problems.

    What I did:
    I set u=-0.5x

    therefore i got (-1/0.5)((e^u)/(1-e^u))du
    I am unsure of what the next step would be

    Please help
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 16, 2009 #2


    Staff: Mentor

    Assuming this is the problem:
    [tex]\int \frac{e^{-.5x}}{1 - e^{-.5x}} dx[/tex]

    Let u = 1 - e-.5x

    Then your integral is more or less
    [tex]\int \frac{du}{u}[/tex]
    which is pretty easy.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Finding the antiderivative of a fractional prob