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Homework Help: Integration by parts

  1. Jan 6, 2008 #1
    1. The problem statement, all variables and given/known data
    I have tried this question a number of times, but to no avail. Could somebody please help with the first couple of lines, thank you.

    [tex]\int_0^x2cte^{-ct^2}dt[/tex] where [tex]c[/tex] is a postive constant


    2. Relevant equations



    3. The attempt at a solution
    Let u=t and let dv=[tex]2ce^{-ct^2}dt[/tex]
     
    Last edited: Jan 6, 2008
  2. jcsd
  3. Jan 6, 2008 #2

    olgranpappy

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    just change variables to [itex]x=ct^2[/itex]. you don't need "integration by parts".
     
  4. Jan 6, 2008 #3
    1. The problem statement, all variables and given/known data

    The above was edited wrong.

    I have tried this question a number of times, but to no avail. Could somebody please help with the first couple of lines, thank you.

    [tex]\int_0^x2cte^{-ct^2}dt[/tex] where [tex]c[/tex] is a postive constant


    2. Relevant equations



    3. The attempt at a solution
    Let u=t and let dv=[tex]2ce^{-ct^2}dt[/tex]
     
  5. Jan 6, 2008 #4

    olgranpappy

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    Homework Helper

  6. Jan 6, 2008 #5
    Take olgranpappy's advice, all you need is a simple u-sub.
     
  7. Jan 6, 2008 #6
    Thank you, it's amazing how a simple question can transform itself into Electromagnetic Field Theory with such ease when a tired human brain is applied. Thank you again.
     
  8. Jan 6, 2008 #7
    Happens to me all the time, no worries :-]
     
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