Results 1 to 2 of 2

Math Help - IVT root question

  1. #1
    Member mybrohshi5's Avatar
    Joined
    Sep 2009
    Posts
    230

    IVT root question

    The statement:

    If f(1)>0 and f(3)<0 then there exists a number c between 1 and 3 such that f(c)=0

    is false but i dont understand why?

    How can you tell when a root (c) will exist between the two given numbers to make f(c)=0?


    thanks

    chad
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Calculus26's Avatar
    Joined
    Mar 2009
    From
    Florida
    Posts
    1,271
    whats missing is is that f(x) must be continuous.

    If f is continuous and f(1) > 0 and f(3) < 0 then there is a c in (1,3)

    st f(c) = 0
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Primitive Root Question
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: November 18th 2010, 05:46 PM
  2. root question
    Posted in the Number Theory Forum
    Replies: 1
    Last Post: March 24th 2010, 12:18 PM
  3. Finding the root question
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 7th 2009, 12:04 PM
  4. root question
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: September 27th 2009, 11:36 AM
  5. Cubed Root Question
    Posted in the Algebra Forum
    Replies: 4
    Last Post: June 4th 2008, 12:07 PM

Search Tags


/mathhelpforum @mathhelpforum