A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 5 years ago

f(x) = 6 + 3x - x3 intervals of increase and decrease. local max and mins. f concave up and concave down. inflection points of f

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1) derive to find the critical numbers 2) susbtitute them in the original function to get the local min & max 3) draw a table putting x, f(x) and f'(x) on one side and the x's on a row. Test them from the left of 0, and from the right of 0, ( don't forget to put your critical numbers) then if your sign is (-) then f'(x) is decreasing, if it's (+) f'(x) is increasing 4)derive once more to find the inflection numbers 5) draw a table (same thing with the critical numbers) but this time if it's - , it's concaved down and if it's + it's concaved up Follow these steps and you'll be alright ^_^ because it'll take more than just 10 mins to solve such question. Good luck! Hope you understand the steps :)

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.