Results 1 to 3 of 3

Math Help - Domain/Range Problem

  1. #1
    Newbie
    Joined
    Jul 2008
    Posts
    6

    Domain/Range Problem

    Me and some of my classmates are stumped on this problem, which asks for the domain and range in interval notation. We are using web-work, an online program where you in-put your answers, and it immediately tells you whether tour answers are right or wrong. So, here's the problem:

    17 √x−12

    I entered "(0, infinity)" for the Domain and "(-12, infinity)" for the range... both were wrong :/ I got those figures by plugging the equation into my graphing calculator and looking at the graph/number table. That, and the fact that any negative x value would not return a real number.

    Any suggestions?
    Last edited by JoeF107; July 29th 2008 at 02:30 PM. Reason: s/p
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by JoeF107 View Post
    Me and some of my classmates are stumped on this problem, which asks for the domain and range in interval notation. We are using web-work, an online program where you in-put your answers, and it immediately tells you whether tour answers are right or wrong. So, here's the problem:

    17 √x−12

    I entered "(0, infinity)" for the Domain and "(-12, infinity)" for the range... both were wrong :/ I got those figures by plugging the equation into my graphing calculator and looking at the graph/number table. That, and the fact that any negative x value would not return a real number.

    Any suggestions?
    I assume it's f(x) = 17 \sqrt{x - 12} ......?

    The (maximal) domain is the set of values of x for which the function is defined. The function is only defined for x - 12 \geq 0. Therefore ........ Plot a graph to see what the range will be.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jul 2008
    Posts
    6
    Thanks for the help, I got it work!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Domain vs Range problem
    Posted in the Algebra Forum
    Replies: 0
    Last Post: April 30th 2010, 11:13 AM
  2. domain/range help
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: February 12th 2010, 07:37 PM
  3. Problem with domain/range of a composition
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 20th 2009, 05:18 AM
  4. need help domain range algebra problem
    Posted in the Algebra Forum
    Replies: 3
    Last Post: October 1st 2009, 11:16 AM
  5. Replies: 6
    Last Post: September 16th 2009, 06:25 AM

Search Tags


/mathhelpforum @mathhelpforum