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Hi every one i need to you

  1. Oct 15, 2006 #1
    how I can slove this intergation


    tank you
  2. jcsd
  3. Oct 15, 2006 #2
    what have you tried?

    [tex] \int \frac{e^{-x}}{x} [/tex]? use integration by parts.
  4. Oct 16, 2006 #3
    tank you master courtrigad

    I tray but I don't get it

    tank you
  5. Oct 16, 2006 #4
    Let [tex] u = e^{-x} [/tex] and [tex] dv = \frac{1}{x} [/tex]
  6. Oct 17, 2006 #5
    That won't get you very far in evaluating the integral, I don't think parts will at all, I think I remember a post from a while ago that this can't be integrated in terms of elementary functions.
  7. Oct 17, 2006 #6
    just do it multiple times
  8. Oct 17, 2006 #7
    And it still won't work very well, if you let dv=1/x then you get a natural log that will make things messy, and if you let u=1/x then you'll just get e-x/x2, e-x/x3 etc..
  9. Oct 17, 2006 #8
  10. Oct 17, 2006 #9

    and whit is the soultions

    tank you
  11. Oct 20, 2006 #10

    is there any body can solve this proplem
  12. Oct 26, 2006 #11

    waher is smart people in math

    any genis here
  13. Oct 26, 2006 #12
    Just for your reference, ريمان, the people who help out here aren't here to do the problem for you or give you the answer outright. We'll just point you in the right direction/ correct what you did wrong and give you a boost. Please respect that.
  14. Oct 30, 2006 #13
    قبل ما تسءل٬ جرب ال سؤ ال
    هذا السؤال لا تقدر أن تكمله

    I think that was a little clearer.. :P My written Arabic's a little rusty though.

    Taylor Series Solution بس تقدر تعمل
    Last edited: Oct 30, 2006
  15. Oct 31, 2006 #14
    hi اهلاً

    I'm solve this problem befor some days by Series

    are you know arabic
  16. Oct 31, 2006 #15
    ا, بس ما بعرف لغة الفصحى
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