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: Lagrange multipliers and combinations of points

  1. Nov 12, 2012 #1
    I was wondering how they got all the different combinations of points? Why can't they just put

    (+-√2,+-1,+-√(2/3)) ?

    Attached Files:

    • mm.jpg
      File size:
      18 KB
  2. jcsd
  3. Nov 12, 2012 #2

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    When y = +1 there are two values of x and z, and when y = -1 there are two values of x and z, making a total of 8 combinations.

  4. Nov 12, 2012 #3


    User Avatar
    Science Advisor

    What you wrote, (+-√2,+-1,+-√(2/3)), would, by the standard conventions, be interpreted as two points, (+√2,+1,+√(2/3)) and (-√2,-1,-√(2/3))
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook