1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Help with this example problem

  1. Oct 29, 2009 #1
    1. The problem statement, all variables and given/known data
    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

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Oct 29, 2009 #2


    User Avatar
    Science Advisor

    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?

    Attached Files:

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook