Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mskyeg Group Title

What is the relative maximum and minimum of the function? f(x)= x^3 + 2x^2 – 18x

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Possible answers: The relative maximum is at (3, 22), and the relative minimum is at (–2, –41). The relative maximum is at (–3, 41), and the relative minimum is at (2, –22). The relative maximum is at (3, 41), and the relative minimum is at (–2, –22). The relative maximum is at (–3, 22), and the relative minimum is at (2, –41).

    • 2 years ago
  2. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I keep getting told what to do but i don't know how to do it

    • 2 years ago
  3. Dido525 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    So take the derivative.

    • 2 years ago
  4. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    do you know how to differentiate..?

    • 2 years ago
  5. Dido525 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Set it equal to zero.

    • 2 years ago
  6. Dido525 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I am assuming if he is doing this he can differentiate :O .

    • 2 years ago
  7. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    you will need the 1st and 2nd derivatives 1st derivative = 0 gives the stationary points 2nd derivative is used to determine the nature of the stationary points

    • 2 years ago
  8. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    it thats to difficult, just find a graphing package and graph the curve like geogebra http://www.geogebra.org/cms/

    • 2 years ago
  9. Dido525 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Or a graphing calculator will do nicely...

    • 2 years ago
  10. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I don't know how to do that....

    • 2 years ago
  11. Dido525 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    No calculus experience? Look like you have to use a calculator or a graphing program like @campbell_st said.

    • 2 years ago
  12. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok... do you have a graphing package...?

    • 2 years ago
  13. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no i don't

    • 2 years ago
  14. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok... here is an alternative/... can you factorise the polynomial..?

    • 2 years ago
  15. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    um can you just show me the steps or something....I have a textbook and the instructions aren't the issue its my ability to apply it to this problem

    • 2 years ago
  16. campbell_st Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok... here is the easiest solution, use the table of values below,..... |dw:1352186589941:dw| substitute each x value into the graph... the largest positive y value will be the relative maximum and the largest negative y value will be the relative minimum. when you have done that, you'll find ordered pairs that match your choices...

    • 2 years ago
  17. mskyeg Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks so much:)

    • 2 years ago
    • Attachments:

See more questions >>>

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...

23

  • 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.