Results 1 to 4 of 4

Math Help - the derivative function

  1. #1
    Member
    Joined
    Sep 2008
    Posts
    144

    the derivative function

    given that f(3)=-1 and f '(3)=5, find an equation for the tangent line to the graph of y=f(x) at x=3

    no idea where to start
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Sep 2008
    Posts
    12
    There is a formula stating that the equation of the tangeant to a curve at point A (a, f(a)) is:

    y-f(a)=(x-a)f'(a)


    civodul
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Sep 2008
    Posts
    144
    i know the answer is y=5x-16 but not seeing how you get to that from that equation
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member 11rdc11's Avatar
    Joined
    Jul 2007
    From
    New Orleans
    Posts
    894
    Just plug in the values for the formula

    y - (-1) = 5(x-3)

    and then simplify
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Derivative of a function
    Posted in the Calculus Forum
    Replies: 2
    Last Post: May 24th 2011, 05:48 PM
  2. [SOLVED] Derivative of this function?
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 28th 2010, 10:02 PM
  3. function --- derivative (help!)
    Posted in the Calculus Forum
    Replies: 7
    Last Post: May 23rd 2010, 12:47 PM
  4. derivative of a function
    Posted in the Calculus Forum
    Replies: 3
    Last Post: April 20th 2010, 12:30 AM
  5. the derivative function
    Posted in the Calculus Forum
    Replies: 0
    Last Post: February 21st 2010, 06:56 AM

Search Tags


/mathhelpforum @mathhelpforum