Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Show me how this equation is valid

  1. May 28, 2014 #1
    Please, hurry. It's driving me nuts
     

    Attached Files:

  2. jcsd
  3. May 28, 2014 #2
    I suppose ##f \geq 0##? If so, ##y\geq x \implies yf(y) \geq xf(y)##.
     
  4. May 28, 2014 #3
    Seconded. Note that y takes on every value >= x, so you have basically replaced the constant x with the increasing function y in the integral.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Show me how this equation is valid
Loading...