Results 1 to 2 of 2

Math Help - Algebraic proof

  1. #1
    Junior Member
    Joined
    Dec 2009
    Posts
    61

    Algebraic proof

    How do i prove this?
    If x > 0, y > 0, prove that x + y ≥ 2√»»xy.
    Thanks.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,790
    Thanks
    1687
    Awards
    1
    Quote Originally Posted by Detanon View Post
    How do i prove this?
    If x > 0, y > 0, prove that x + y ≥ 2√»»xy.
    Thanks.
    (a-b)^2\ge 0
    a^2-2ab+b^2\ge 0
    Let a=\sqrt{x}~\&~b=\sqrt{y}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Algebraic Numbers Proof
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: October 10th 2011, 02:47 PM
  2. Algebraic Proof
    Posted in the Algebra Forum
    Replies: 4
    Last Post: March 15th 2010, 02:55 PM
  3. Proof of algebraic number
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: May 10th 2009, 08:46 PM
  4. algebraic manipulation for proof
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 8th 2009, 11:08 AM
  5. Help with an algebraic proof
    Posted in the Algebra Forum
    Replies: 5
    Last Post: March 29th 2008, 02:35 PM

Search Tags


/mathhelpforum @mathhelpforum