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: Series rewrite question

  1. Dec 11, 2011 #1
    Picture of problem included. Just wondering how to get from the first step to the second step?
    Thanks!
     

    Attached Files:

  2. jcsd
  3. Dec 11, 2011 #2

    LCKurtz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Factor a 4 out of the numerator.
     
  4. Dec 11, 2011 #3
    That leaves me with 4 (1^n/3^n-1) though doesn't it?
     
  5. Dec 11, 2011 #4

    LCKurtz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    No. What is [itex]4^1\cdot 4^{n-1}[/itex]?
     
  6. Dec 11, 2011 #5
    Oh I see now. Thanks!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook