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!

Multiplying by a conjugate?

  1. Mar 16, 2009 #1
    multiplying by a conjugate??

    1. The problem statement, all variables and given/known data

    I am dealing with a limit, however, I am not sure how to multiply by a conjugate when there are two variables and three terms on top. For example

    lim [3h + sqrt( 2x +2h) - sqrt( 2x)] / h
    h->0


    i dont need help solving it, i just need to know how would we multiply it by a conjugate when there are more than 2 terms?
     
  2. jcsd
  3. Mar 16, 2009 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Re: multiplying by a conjugate??

    I don't know how you got that but lim h->0 3h/h=3. There. Now you only have two terms in the numerator.
     
  4. Mar 16, 2009 #3
    Re: multiplying by a conjugate??

    how did you get h=3?, I tried the problem aswell and got stuck.
     
  5. Mar 16, 2009 #4

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Re: multiplying by a conjugate??

    I didn't get h=3. I got limit h->0 3h/h=3. That leaves you with figuring out limit h->0 (sqrt(2x+2h)-sqrt(2x))/h.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Multiplying by a conjugate?
  1. Conjugate gratient (Replies: 0)

  2. Conjugate Subgroups (Replies: 1)

  3. Harmonic conjugates (Replies: 6)

  4. Subgroups - Conjugates (Replies: 11)

Loading...