Results 1 to 3 of 3

Math Help - Functions

  1. #1
    Newbie
    Joined
    Jun 2008
    Posts
    8

    Functions

    I need help with the following:

    1. Find the domain of the function.
     g(x) = 1/x - 3/(x+2)
    I know the answer is (-∞,-2) or (-2,0) or (0,∞)
    but why?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Apr 2008
    Posts
    1,092
    The domain for this function is restricted because you may not divide by zero. All real values of x except those that create division by zero situations are legal. The offending values of x are -2 and 0, so that is why the domain is as you have stated.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by juldancer View Post
    I need help with the following:

    1. Find the domain of the function.
     g(x) = 1/x - 3/(x+2)
    I know the answer is (- \infty,-2) \ \ or \ \  (-2,0) \ \ or \ \  (0, +\infty)
    but why?
    Because x cannot equal 0, and x cannot equal -2. Everything else is ok.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 15th 2010, 05:50 PM
  2. Replies: 3
    Last Post: February 23rd 2010, 04:54 PM
  3. Replies: 11
    Last Post: November 15th 2009, 11:22 AM
  4. Replies: 7
    Last Post: August 12th 2009, 04:41 PM
  5. Replies: 1
    Last Post: April 15th 2008, 09:00 AM

Search Tags


/mathhelpforum @mathhelpforum