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: Mathematical induction null sequence

  1. Jan 12, 2006 #1
    Show that the sequence given by An = n/2^n is a null sequence..

    Hint: We have proved by mathematical induction that2^n >or equal n^2, n> or equal 5...

    pls help.....
  2. jcsd
  3. Jan 12, 2006 #2
    show that the limit n/2^n approaches 0...or that 2^n >>>> n as n goes to infinity.....you know 2^n>=n^2 given above...now what can you show iwth n,n^2
  4. Jan 12, 2006 #3
    which means n is small and 2^n is much bigger so if they are divided then the answer is appro zero??
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook