Results 1 to 6 of 6

Math Help - error function!!

  1. #1
    Newbie
    Joined
    May 2013
    From
    Iran
    Posts
    3

    Question error function!!

    Hi
    I have a problem I hope you can help me solve. I am working with the error function. I have looked at
    some papers involving all the combinations of this function with other functions and their integrations, but this particular model is not listed in there:

    int{erf(a*sqrt((x-a)^2+b^2))))/((x-a)^2+b^2)} with respect to x

    I would really appreciate it if you let me know which formula you think I should use to derive this integral.
    Many thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,826
    Thanks
    669

    Re: error function!!

    Hey kereshmeh.

    Try using a substitution formula for u = (x-a)^2 and see where that takes you.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Jul 2012
    From
    INDIA
    Posts
    831
    Thanks
    209

    Re: error function!!

    Please recheck if the question has been written correctly.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    May 2013
    From
    Iran
    Posts
    3

    Re: error function!!

    It's correct
    what is the problem
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Jul 2012
    From
    INDIA
    Posts
    831
    Thanks
    209

    Re: error function!!

    Note the number of pairs of parenthesis in the numerator
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    May 2013
    From
    Iran
    Posts
    3

    Re: error function!!

    error function!!-int.jpg
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. I need some help with an error function
    Posted in the New Users Forum
    Replies: 0
    Last Post: June 23rd 2012, 06:40 AM
  2. Replies: 2
    Last Post: April 17th 2012, 10:50 AM
  3. [SOLVED] The error function and incomplete gamma function
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: January 31st 2010, 03:24 PM
  4. Error function
    Posted in the Calculus Forum
    Replies: 4
    Last Post: March 18th 2009, 07:06 PM
  5. error function
    Posted in the Calculus Forum
    Replies: 1
    Last Post: April 27th 2008, 04:12 PM

Search Tags


/mathhelpforum @mathhelpforum