Results 1 to 3 of 3

Math Help - End points and brackets

  1. #1
    Member
    Joined
    Jun 2008
    Posts
    88

    End points and brackets

    Often we'll receive questions that have a graph looking like the first picture I posted, with either circle or dot end points.
    Also, sometimes we'll get a domain given as [-2,7).

    I don't understand what these different brackets and end points mean. Please explain! Thanks
    Attached Thumbnails Attached Thumbnails End points and brackets-axislol.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member Greengoblin's Avatar
    Joined
    Feb 2008
    From
    UK
    Posts
    182
    Square brakets mean a closed interval (dot), and round brackets mean an open interval (circle). so [-2,7) means -2 \le x <7 so the closed endpoint includes the bound, but the open endpoint doesn't.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jun 2008
    Posts
    88
    Ah...that's what I assumed. That it was relatively simple, but I just didn't get it.
    Thanks. That little tidbit is sure to come in handy.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: August 24th 2011, 12:35 PM
  2. Replies: 1
    Last Post: February 9th 2011, 11:52 AM
  3. Brackets
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 21st 2010, 01:00 PM
  4. brackets
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: January 26th 2010, 01:19 PM
  5. Replies: 3
    Last Post: January 11th 2009, 12:49 PM

Search Tags


/mathhelpforum @mathhelpforum