Results 1 to 2 of 2

Thread: Function trouble!

  1. #1
    Sep 2008

    Function trouble!

    Hey guys!

    We've spent the last 5 classes using derivatives to study to graphically represent functions, but there are some functions which seem to give you a headache.

    for example : $\displaystyle f(x)=\frac{(4-x)^3}{9(2-x)}$

    i found where the function is defined ($\displaystyle (-\infty , 2)u (2 , +\infty)$),
    i found the asimptotes ( it has only a vertical one at $\displaystyle x=2$) , but when I have to find monotony and extreme values I get stuck.
    First I find the first derivative, then I have to make it equal to zero and then I'm left with $\displaystyle -3x^3+35x^2-135x+176=0$. how do I find x from here?

    It sounds silly, but i'm kinda stuck.

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Sep 2008
    no worries, I got it right!
    thnx anyhow
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Trouble with old notation and an unknown function space
    Posted in the Advanced Math Topics Forum
    Replies: 0
    Last Post: Oct 4th 2011, 08:23 AM
  2. Having trouble with graph of trig. function
    Posted in the Calculus Forum
    Replies: 3
    Last Post: Nov 1st 2009, 11:06 PM
  3. Replies: 1
    Last Post: Jun 24th 2009, 04:00 PM
  4. Replies: 1
    Last Post: Feb 11th 2009, 12:35 PM
  5. Gamma Function Proofs - having trouble
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: Nov 12th 2008, 12:35 AM

Search Tags

/mathhelpforum @mathhelpforum