1. Not finding help here? Sign up for a free 30min 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!

Simplifying the following function

  1. Oct 16, 2012 #1
    1. The problem statement, all variables and given/known data
    I have stumbled upon the following equation on wikipedia
    http://upload.wikimedia.org/math/b/8/d/b8de8bfcdf40f1793e7b72755161d61f.png

    To clarify, I am not sure how to simplify the equation of the form

    x^2/(1-x) = 1/(x^2 - x^-2)

    as demonstrated in the second line of the equation.

    3. The attempt at a solution

    I temporarily reciprocated the equation to become

    (1-x)/ x^2 = (x^2 - x^-2)

    But,

    1/x2 - x/x2 ≠ (x2 - x-2) ...?

    Something is terribly wrong here. Please advice.
     
  2. jcsd
  3. Oct 16, 2012 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    I think you are misreading where the exponents of 2 are. The form you want to show is x/(1-x^2)=1/(1/x-x).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Simplifying the following function
  1. Simplify the following (Replies: 3)

Loading...