A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Find the domain f(x)=(x+2)/(x^2-1)

  • This Question is Closed
  1. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You're looking at the restrictions, so where the denominator is = 0, so solve for \[x^2 - 1 = 0\]

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

    \[\pm1\]

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

    i got that part. i don't exactly know how to write it in interval notation tho

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

    (\[-\infty,-1]\cup(0,1]\cup(1,\infty)\]

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

    i don't think i did it right

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

    You could write it as such \[( - \infty, - 1) \cup (1, \infty)\] because open bracket implies it's not included, a square bracket means, it would be included in the domain.

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

    of course I forgot 0 xD

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

    But you get the point right?

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

    I used to hate those write in set notation or interval notation parts to the question because I got confused with ( and ]. This was before OpenStudy popped up.

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

    Yeah I can't remember last time I even used interval notation to be honest

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

    College Algebra had truckloads... but the thing is it doesn't appear again afterwards.

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

    Yea, I used it in calculus 1, then never saw it again haha...

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

    |dw:1434430709134:dw| so this is how it looks like in a number line (random example) \[(- \infty, -1/2] \cup [3, \infty)\] I think this will make it clear on what exactly is going on.

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

    |dw:1434430860916:dw|

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

    thanks this is going to help a lot for the rest of my hw

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

    No problem :)

  17. 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.