Results 1 to 3 of 3

Math Help - Quick algebra question

  1. #1
    Member
    Joined
    Feb 2009
    Posts
    77
    Thanks
    2

    Quick algebra question

    I have an interval for a certain function.

    -1<4x^2<1

    How do I solve for x with the negative on the left?

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,607
    Thanks
    1574
    Awards
    1

    Re: Quick algebra question

    Quote Originally Posted by minneola24 View Post
    I have an interval for a certain function.

    -1<4x^2<1

    How do I solve for x with the negative on the left?
    That tells you that |x|<\sqrt{\frac{1}{4}}

    That also answers your question about the radius of convergence.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,530
    Thanks
    1388

    Re: Quick algebra question

    Since 4x^2 cannot be negative, " -1< 4x^2<1" is the same as " 0\le 4x^2< 1".
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Quick Finding Y Values Question (algebra 1)
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: August 13th 2008, 12:19 PM
  2. linear algebra quick question
    Posted in the Advanced Algebra Forum
    Replies: 6
    Last Post: June 7th 2008, 10:36 PM
  3. Quick Algebra question (logs and stuff)
    Posted in the Algebra Forum
    Replies: 37
    Last Post: May 17th 2008, 07:19 PM
  4. Quick algebra question (logs)
    Posted in the Algebra Forum
    Replies: 51
    Last Post: May 16th 2008, 10:33 PM
  5. Quick algebra question
    Posted in the Algebra Forum
    Replies: 1
    Last Post: April 8th 2008, 10:13 PM

Search Tags


/mathhelpforum @mathhelpforum