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Some double integration help

  1. Oct 23, 2005 #1
    Hoping someone can help here. I have to double integrate this:

    http://img467.imageshack.us/img467/2171/integrate27rq.jpg [Broken]

    And ive been told that the following expressions are useful:

    http://img486.imageshack.us/img486/8706/integrate18yl.jpg [Broken]

    Now..i can integrate once using the second expression, but then i get stuck. Do i either evaluate the first integration and then integrate whats left over or do i integrate again and then evaluate? If i evaluate straight away i seem to get infinity/infinity - infinity/infinity which is 0, and then the whole expression becomes 0. Which seems a bit silly.

    I cant see how the first expression helps either.

    Hoping someone can give some pointers :(
    Last edited by a moderator: May 2, 2017
  2. jcsd
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