A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Use synthetic division to determine whether the number k is an upper or lower bound (as specified for the real zeros of the function f). k = 2; f(x) = 2x3 + 3x2 - 4x + 4; Lower bound?

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

    I got yes, is that correct?

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That is a different question.

  3. 0_0youscareme
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh okay

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you have any idea if my answer is correct?

  5. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    what does it mean to be an lower bound?

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Alternation between non negative and non positive in signs, post division.

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I think

  8. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    hmm, there is a thrm about it, can you post your materials thrm for it?

  9. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut39_zero2.htm this seems to be what you are learning about

  10. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    2x3 + 3x2 - 4x + 4 0 4 14 20 k=2| 2 7 10 24 since all the results are the same sign ... k=2 seems to be what type of bound?

  11. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    2x3 + 3x2 - 4x + 4 0 -4 2 4 k=-2| 2 -1 -2 8 when we let k=-2, the signs are not alternating are they ...

  12. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    http://www.wolframalpha.com/input/?i=y%3D2x%5E3+%2B+3x%5E2+-+4x+%2B+4 notice that it only has one real root, and it is less than 2 ... it is even less then -2 if tha tmatters

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, so it is not lower bound.

  14. 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...

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.