Results 1 to 4 of 4

Math Help - find the value

  1. #1
    Junior Member
    Joined
    Sep 2012
    From
    Kota
    Posts
    73

    find the value

    given that x+y+z=3 and xy+yz+zx=a . find that value of a for which a(max) - a(min)= 8
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member MaxJasper's Avatar
    Joined
    Aug 2012
    From
    Canada
    Posts
    482
    Thanks
    55

    Lightbulb Re: find the value

    Quote Originally Posted by geniusgarvil View Post
    given that x+y+z=3 and xy+yz+zx=a . find that value of a for which a(max) - a(min)= 8
    This surface has its peak at {1, 1, 3-a} and its min at -infinity:



    So, please explain what you mean by a(min)
    Attached Thumbnails Attached Thumbnails find the value-xy-yz-zx.png  
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2012
    From
    Kota
    Posts
    73

    Re: find the value

    a(min) means a's minimum value.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member MaxJasper's Avatar
    Joined
    Aug 2012
    From
    Canada
    Posts
    482
    Thanks
    55

    Re: find the value

    So a(min)=-infinity...it appears that perhaps a(min) should have an (x,y) also assigned to it otherwise the function's min is -infinity.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 8
    Last Post: March 22nd 2011, 05:57 PM
  2. Replies: 2
    Last Post: July 5th 2010, 09:48 PM
  3. Replies: 1
    Last Post: February 17th 2010, 04:58 PM
  4. Replies: 0
    Last Post: June 16th 2009, 01:43 PM
  5. Replies: 2
    Last Post: April 6th 2009, 09:57 PM

/mathhelpforum @mathhelpforum