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Help with this example problem

  1. Oct 29, 2009 #1
    1. The problem statement, all variables and given/known data
    hello
    this is a example problem in book "Probability, Random Variables and Stochastic Processes 4th ed - Papoulis" pg 183

    i am wondering how particular value came.i havemarked with red circle it in attached pdf file.
    please take a look
    thanks


    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 29, 2009 #2

    HallsofIvy

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    They are calculating the area of the shaded region. The area of region S, is [itex]A= \int_S\int dA[/itex] which, in Cartesian coordinates, is [itex]\int_S\int dxdy[/itex]. Of course dxdy= 1 dxdy.
     
  4. Oct 29, 2009 #3
    well shouldnt it be as following pdf?
    x=z-y
    dx=dz
     

    Attached Files:

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