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Homework Help: Help in this integration.

  1. Apr 6, 2010 #1
    1. The problem statement, all variables and given/known data

    [tex]y(x)=\int f(x)sinh(a-x)dx \;\;for\;\;0<x<a[/tex]

    Solve for y(x)

    Convension way is:

    [tex]y(x)=\int_0^x f(s) sinh(a-s)ds [/tex]

    But the book gave:

    [tex]y(x)=\int_x^a f(s) sinh(s)ds [/tex]

    I don't see the connection.
  2. jcsd
  3. Apr 6, 2010 #2


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    are there any other properties of y or f to use?
  4. Apr 6, 2010 #3
    No. As you see, I am not looking for the solution. It is the way that I set up the equation is different from the book and I tried and cannot get the same answer.

    This is a simplified version of a complicate Poisson's equation and I cannot agree with the book on the way how the book did on the change of variable.
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