Page 2 of 2 FirstFirst 12
Results 16 to 17 of 17
Like Tree6Thanks

Math Help - An Algebra question!

  1. #16
    Newbie
    Joined
    Jun 2013
    From
    India
    Posts
    10

    Re: An Algebra question!

    Quote Originally Posted by Idea View Post
    abc=1 does not imply a,b,c is -1 or +1 as these are real numbers, e.g. a=1/3, b=2, c=3/2 , abc=1
    As for the other question, a,b,c>0 is not an assumption. It follows from the given.
    Hmm, yea, you are right. But can you explain a bit how you got a,b,c>0 from given?
    Follow Math Help Forum on Facebook and Google+

  2. #17
    Junior Member
    Joined
    Jun 2013
    From
    Lebanon
    Posts
    31
    Thanks
    17

    Re: An Algebra question!

    Suppose a > 0 and b < 0 , c < 0

    a^2 - a = b + c - b^2 - c^2 < 0 implies a < 1 and bc > 1 since abc = 1

    ( b + c )^2 >= 4bc > 4 so that b + c would be less than -2 and so a + b + c < -1
    Follow Math Help Forum on Facebook and Google+

Page 2 of 2 FirstFirst 12

Similar Math Help Forum Discussions

  1. Algebra question
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 19th 2012, 11:17 PM
  2. can u help me for this question of algebra
    Posted in the Algebra Forum
    Replies: 6
    Last Post: September 3rd 2011, 01:10 AM
  3. Algebra Question
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: October 6th 2010, 03:48 AM
  4. Algebra Question
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 11th 2009, 04:58 PM
  5. Algebra Question
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 2nd 2008, 03:36 PM

Search Tags


/mathhelpforum @mathhelpforum