Results 1 to 2 of 2

Math Help - Chain Rule & Product Rule

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    11

    Chain Rule & Product Rule

    Im trying to find when x = 1 what is the deritiave of the function g(x) = 2x^2(4x+1)^3

    What I got so far was g `(x) = 3(4x+1)^2(4) + 4x(4x+1)^3
    = 300 + 500
    = 800

    This is apparently the wrong answer but I don't know what I am doing wrong. Any help/advice would be appreciated.

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member bugatti79's Avatar
    Joined
    Jul 2010
    Posts
    461
    Quote Originally Posted by Marko_02 View Post
    Im trying to find when x = 1 what is the deritiave of the function g(x) = 2x^2(4x+1)^3

    What I got so far was g `(x) = (2x^2)3(4x+1)^2(4) + 4x(4x+1)^3
    = 300 + 500
    = 800

    This is apparently the wrong answer but I don't know what I am doing wrong. Any help/advice would be appreciated.

    Thanks
    You forget the 2x^2 term, see edit.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 9
    Last Post: November 9th 2010, 01:40 AM
  2. Derivatives - product rule + chain rule
    Posted in the Calculus Forum
    Replies: 6
    Last Post: October 19th 2009, 03:26 PM
  3. Replies: 5
    Last Post: October 19th 2009, 01:04 PM
  4. Replies: 3
    Last Post: May 25th 2009, 06:15 AM
  5. how to apply chain rule and product rule on Ti-89
    Posted in the Calculators Forum
    Replies: 4
    Last Post: March 23rd 2009, 06:45 AM

Search Tags


/mathhelpforum @mathhelpforum