Results 1 to 3 of 3

Math Help - Integral of dx/(C-x)

  1. #1
    Newbie
    Joined
    Jul 2012
    From
    Seattle
    Posts
    18
    Thanks
    2

    Integral of dx/(C-x)

    How would I calculate the integral of

    dx/(C-x)

    C is a constant.

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Jun 2012
    From
    AZ
    Posts
    616
    Thanks
    97

    Re: Integral of dx/(C-x)

    A simple substitution: u = C-x \Rightarrow du = -dx. Therefore

    \int \frac{dx}{C-x} = -\int \frac{du}{u} = -\ln |u| + k = -\ln |C-x| + k (k is another arbitrary constant).
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jul 2012
    From
    Seattle
    Posts
    18
    Thanks
    2

    Re: Integral of dx/(C-x)

    Thanks Richard. It's coming back now. I has been a few years since I have done this!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: August 31st 2010, 07:38 AM
  2. Replies: 1
    Last Post: June 2nd 2010, 02:25 AM
  3. Replies: 0
    Last Post: May 9th 2010, 01:52 PM
  4. [SOLVED] Line integral, Cauchy's integral formula
    Posted in the Differential Geometry Forum
    Replies: 3
    Last Post: September 15th 2009, 01:28 PM
  5. Replies: 0
    Last Post: September 10th 2008, 07:53 PM

Search Tags


/mathhelpforum @mathhelpforum