1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Increasing and decreasing function

  1. Mar 29, 2009 #1
    1. The problem statement, all variables and given/known data

    y= x √6-x^2

    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 29, 2009 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi louie3006! :smile:
    erm :redface: … what's the question? :confused:
     
  4. Mar 29, 2009 #3
    we need to find out if the function is increasing or decreasing by using the first derivative test and then setting it equal to zero, but i don't know how to get the 1st derivative of this thing ? any thoughts on that ?
     
  5. Mar 29, 2009 #4
    Do you know how to compute derivatives? If you do, then you should be able to compute the derivative of 'that thing'.
     
  6. Mar 29, 2009 #5
    look at product and chain rule, then everything should work out.
     
  7. Mar 30, 2009 #6
    thank you
     
  8. Mar 30, 2009 #7

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Writing it as [itex]x(6- x^2)^{1/2}[/itex] helps a lot.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook