Results 1 to 3 of 3

Math Help - domain of a function

  1. #1
    Newbie
    Joined
    Mar 2007
    From
    East Meadow, NY
    Posts
    23

    domain of a function

    Hi,

    I can not figure out the answer to the following problem, can someone please explain?

    f(x)= X+4/X-3

    What is it's domain?

    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by dasani View Post
    Hi,

    I can not figure out the answer to the following problem, can someone please explain?

    f(x)= X+4/X-3

    What is it's domain?

    Thanks!
    You can think of the domain of a function as all x-values for which the function is defined. here we see there is a problem at x = 3. if x = 3, the denominator becomes zero and the function undefined. thus the domain of this function is given by:

    dom(f) = all real x where x not=3

    or

    dom(f) = {all x| x not=3}

    or

    dom(f): (-infinity,3)U(3,infinity)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Mar 2007
    From
    East Meadow, NY
    Posts
    23
    Thank you so much for your quick reply
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. domain of function
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 21st 2010, 12:57 PM
  2. Domain of the Function
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 6th 2009, 03:11 PM
  3. Domain of a Function
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: September 30th 2009, 10:51 PM
  4. help with the domain of the function
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: February 17th 2009, 05:09 PM
  5. domain of a function
    Posted in the Algebra Forum
    Replies: 3
    Last Post: August 17th 2008, 05:38 PM

Search Tags


/mathhelpforum @mathhelpforum