Results 1 to 3 of 3

Math Help - find h'(2)..

  1. #1
    Member
    Joined
    Feb 2010
    Posts
    146

    find h'(2)..

    Suppose f'(2)=3, f'(5)=4 and let h(x) be the composite function h(x)=f( x^2+1). Find h'(2).

    Do I need a formal proof and stuff?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,628
    Thanks
    430
    Quote Originally Posted by tn11631 View Post
    Suppose f'(2)=3, f'(5)=4 and let h(x) be the composite function h(x)=f( x^2+1). Find h'(2).

    Do I need a formal proof and stuff?
    all you need is the chain rule ...

    h(x) = f(x^2+1)

    h'(x) = f'(x^2+1) \cdot 2x

    h'(2) = f'(5) \cdot 4
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Feb 2010
    Posts
    146
    The reason I asked if it need a proof, and posted in the analysis section was because its out of an into to applied analysis book..but thank you!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 8
    Last Post: March 22nd 2011, 04:57 PM
  2. Replies: 2
    Last Post: July 5th 2010, 08:48 PM
  3. Replies: 1
    Last Post: February 17th 2010, 03:58 PM
  4. Replies: 0
    Last Post: June 16th 2009, 12:43 PM
  5. Replies: 2
    Last Post: April 6th 2009, 08:57 PM

/mathhelpforum @mathhelpforum