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Find x co-ordinates of the turning points of a function

  1. Aug 22, 2011 #1
    Hi!!

    Find the x co-ordinates of the turning points of a function

    Y=2x^3+36x-1

    Determine the nature of the turning points.

    I've been reading up on differentiation, I understand but I'm unsure what to do here. If someone could give me some helpful steps so I could learn to do this for my exam tomorrow I'd be grateful

    Thanks
     
  2. jcsd
  3. Aug 22, 2011 #2

    gb7nash

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    Homework Helper

    You tell me. What is the slope of a turning point of the graph?
     
  4. Aug 22, 2011 #3
    Its the gradient? Its the solution of to find x that I'm confused about. Do I differentiate it to simply it? Is that the answer the questions for or what else should I be looking at to solve it.
     
  5. Aug 22, 2011 #4

    Mark44

    Staff: Mentor

    Start by answering gb7nash's question, then we can go from there.
     
  6. Aug 22, 2011 #5

    PAllen

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    Science Advisor
    Gold Member

    Seems like you're asking us to help you not read or listen in class (sorry). Ask (and look up) the following:

    - what characterized a turning point?
    - what determines whether it is min, max or saddle point?

    Really, if someone does any more for you, they're just doing your work.
     
  7. Aug 22, 2011 #6
    Ok thanks, I look those things up. I appreciate the help.
     
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