Results 1 to 5 of 5

Thread: Integral of e^(-x)

  1. #1
    Junior Member
    Joined
    Jul 2009
    Posts
    40

    Integral of e^(-x)

    I was wondering what is the Integral of e^(-x)?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    15,959
    Thanks
    3580
    Quote Originally Posted by chevy900ss View Post
    I was wondering what is the Integral of e^(-x)?
    -e^{-x} + C
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member DeMath's Avatar
    Joined
    Nov 2008
    From
    Moscow
    Posts
    474
    Thanks
    5
    Quote Originally Posted by chevy900ss View Post
    I was wondering what is the Integral of e^(-x)?
    Try to make this subtitution -x=u

    \int {{e^{ - x}}dx}  = \left\{ \begin{gathered}<br />
   - x = u, \hfill \\<br />
  dx =  - du \hfill \\ <br />
\end{gathered}  \right\} =  - \int {{e^u}du} .
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Oct 2008
    Posts
    1,035
    Thanks
    49
    Just in case a picture helps...



    ... where (as usual) ...



    represents the chain rule for differentiation - straight continuous line differentiating down (integrating up) with respect to x, the straight dashed line similarly but with respect to the dashed balloon expression.

    Don't integrate - balloontegrate!

    Balloon Calculus Forum
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Jul 2009
    Posts
    40
    Ok thanks for the help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: Aug 31st 2010, 07:38 AM
  2. Replies: 1
    Last Post: Jun 2nd 2010, 02:25 AM
  3. Replies: 0
    Last Post: May 9th 2010, 01:52 PM
  4. Replies: 0
    Last Post: Sep 10th 2008, 07:53 PM
  5. Replies: 6
    Last Post: May 18th 2008, 06:37 AM

Search Tags


/mathhelpforum @mathhelpforum