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!

Second approximation

  1. Dec 30, 2005 #1
    I have this algebraic term: (1+i)^-1 where i is very very small i<<<1

    if we used second approximation what would it equal to?

    thanks in advance!
  2. jcsd
  3. Dec 30, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    You can use the binomial expansion:

    [tex]\frac {1}{1+i} = 1 - i + i^2 + \cdot \cdot \cdot[/tex]

    so in first approximation you have 1 and in second approximation 1 - i etc.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook