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: Finding the cumulative

  1. Feb 18, 2010 #1
    I have trouble with this exercise:

    I don't know how to do part b
    I think in part a:
    Is that true? Could someone check it for me and explain how to do part b
    thanks a lot!
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted