Results 1 to 3 of 3

Math Help - derivative of a function

  1. #1
    Newbie
    Joined
    May 2009
    Posts
    5

    derivative of a function

    Hello, I have finals over a few calculus concepts covered in pre-calc class in a couple of days. Here is a problem I would like solved with the written step by step process. Not trying to cheat or anything i just want to have the step by step process so it is clearer in my mind, especially since i need a decent score on the test. thx.

    1. Find the derivative of f(x)=x^3
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member TheAbstractionist's Avatar
    Joined
    Apr 2009
    Posts
    328
    Thanks
    1
    Quote Originally Posted by thermisius View Post
    Hello, I have finals over a few calculus concepts covered in pre-calc class in a couple of days. Here is a problem I would like solved with the written step by step process. Not trying to cheat or anything i just want to have the step by step process so it is clearer in my mind, especially since i need a decent score on the test. thx.

    1. Find the derivative of f(x)=x^3
    Calculate \frac{f(x+h)-f(x)}h and take the limit as h\to0.

    \frac{f(x+h)-f(x)}h=\frac{(x+h)^3-x^3}h=\frac{3x^2h+3xh^2+h^3}h=3x^2+3xh+h^2

    Hence the limit as h\to0 is 3x^2.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    May 2009
    Posts
    5
    thank you, that really helps me out.
    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