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

cwtan Group Title

Find the range of \(\Huge \frac {3x^2-2x-1}{x^2+x+2}\) if x is real.

  • one year ago
  • one year ago

  • This Question is Closed
  1. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Is calculus available as a tool for this?

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

    I dun think it need calculus.....

    • one year ago
  3. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    No, but it would be quite straightforward if you used it.

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

    but this is a 4 mark question and i need the steps to get the mark...... if use calculus i dun think i can get full mark for this question.... (at least 1 mark 1 step)

    • one year ago
  5. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    okay, well that sounds like there's a particular way you're supposed to do it. What class is it?

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

    Polynomial/

    • one year ago
  7. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm not sure what you mean by that. Is it an algebra class or something? And does it ask you to complete a series of 4 steps?

    • one year ago
  8. cwtan Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    somtething like: http://www.stpmwiki.com/index.php/Polynomials_Part2

    • one year ago
  9. cwtan Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    and http://www.stpmwiki.com/index.php/Polynomials_Part1

    • one year ago
  10. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    whoa whoa whoa. Are you looking for a range or a remainder?

    • one year ago
  11. cwtan Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i duno which part can be use to find the range :( but i know the syllabus is just in that 2 webpage

    • one year ago
  12. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I say again, just to clarify... you're looking for the range of the function? Which means all of the possible values it could take? Or you're looking for the remainder of the fraction once you've divided?

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

    find the range for the fraction possible

    • one year ago
  14. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    lets say, \(\frac {3x^2-2x-1}{x^2+x+2} = k \) => \(3x^2-2x-1 = k(x^2+x+2)\) \((3-k)x^2 + (-2-k)x + (-1-2k) = 0\)

    • one year ago
  15. cwtan Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you veryyyy much!!

    • one year ago
  16. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    since, x is real, \(b^2 - 4ac >= 0 \) => \((2+k)^2 - 4(k-3)(1+2k) >= 0\) \((k-4)(k+4/7) >= 0\)

    • one year ago
  17. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    np :)

    • one year ago
  18. Jemurray3 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I like that! I've never done it that way before. @cwtan I'm somewhat surprised that this is a viable technique for you in this instance given what I read in your syllabus, but I suppose if it works it works.

    • one year ago
  19. ganeshie8 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    yea this is fallback option when calculus is not allowed.... mukushla taught me this few few days back... :)

    • one year 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.