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!

Homework Help: Stupid question

  1. Jun 16, 2007 #1
    this will probably seem like a really stupid question but here goes.

    If z = 3 + 2i find the following

    i) z

    ii) z x z(with a horizontal line above it)

    iii) z^2

    what does the horizontal bar mean, i can't find it in my reivsion books lol.

  2. jcsd
  3. Jun 16, 2007 #2


    User Avatar
    Science Advisor

    I suspect that a) was [itex]\overline{z}[/itex] rather than just z itself!

    [itex]\overline{z}[/itex] is the "complex conjugate", a remarkably useful form: if z= x+ iy then [itex]\overline{z}[/itex]= x- iy.
  4. Jun 16, 2007 #3

    and yes a) was suposed to be [itex]\overline{z}[/itex] lol
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook