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: Sum of Series.

  1. Nov 8, 2007 #1
    1. The problem statement, all variables and given/known data
    Find the sum of the following series


    3. The attempt at a solution



  2. jcsd
  3. Nov 8, 2007 #2
    I am not really sure of how to do this but looking at your last line, I think you messed up taking the second derivative of x^2/(1-x) since you need to use the quotient rule, the (1-x) should be squared on each derivative
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook