Results 1 to 4 of 4

Thread: Calculus...graphs/derivatives

  1. #1
    Member
    Joined
    Dec 2008
    Posts
    92

    Calculus...graphs/derivatives

    http://i42.tinypic.com/scv191.jpg

    The problem, answer, and my questions are all in there ^^

    Thanks in advance for any insight!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    12,028
    Thanks
    846
    Hello, janedoe!

    Looks good! . . . Nice work!

    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Dec 2008
    Posts
    92
    I think you misunderstood me...that's the book's answer, but I don't know how they got it. My questions are in blue at the bottom.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Apr 2005
    Posts
    18,188
    Thanks
    2424
    Uh, Soroban, that picture is copied from the answer key and is what janedoe is asking about!

    janedoe, exactly how you would put it into a calculator depends on the calculator.

    You certainly should be able to put in y1= (2(x+ 0.01)- (x+0.01)^2- 2(x)+ x^2)/0.01, for the straight line. The parabola is, of course, [tex]y2= 2x- x^2[/itex].

    Finally, they know it is "similar to graph of the derivative of f(x)" because the derivative is given by \lim_{h\rightarrow 0}\frac{f(x+h)- f(x)}{h} and 0.01 is not very far from 0.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. derivatives and graphs
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Sep 27th 2009, 06:36 PM
  2. Replies: 3
    Last Post: Sep 27th 2009, 02:19 PM
  3. Graphs of Derivatives
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Aug 28th 2009, 07:00 PM
  4. Derivatives and Graphs
    Posted in the Calculus Forum
    Replies: 4
    Last Post: Oct 5th 2008, 04:43 PM
  5. Graphs and their Derivatives
    Posted in the Pre-Calculus Forum
    Replies: 7
    Last Post: Sep 17th 2008, 01:07 PM

/mathhelpforum @mathhelpforum