A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Hi THis is for Trig/Pre-calc I was wondering how do you exactly do this. How to state the domain of each function and evaluate each function and state the domain.

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

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

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

    Numbers 1- 4 is Evaluate each function and state the domain. 5-8 is state the domain of each function.

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

    @ganeshie8

  5. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The first two have a domain of `the set of all real numbers`. We can plug in any real number for x and get some number for y. There are no division by zero errors to worry about. We also don't have to worry about taking the square root of a negative number.

  6. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    However, the third one will have a division by zero error. Do you see which x values cause the denominator to be zero?

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

    Which first two?

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

    I have the answers to these questions already that my teacher gave me already,but I just not sure how exactly how he got these answers.

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

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

    On domain problems, you always want to first look for what's illegal and excluding those out. From looking at your test review, you have 2 main things: 1) 1/0 ........is illegal and are not in the realm of real numbers! 2) squareroot of a negative...... is illegal and not in the realm of real numbers! So any numbers that make those two things happen cannot be in your domain. Otherwise everything else that evaluates to the value IS in your domain. Hope that helps!

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

    oops 1) is just dividing by zero, not just 1/0

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

    So anything 0 or square root of a negative is not a real number?

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

    Also for number 3 is this the right reason that it gives the function an undefined answer makes x not equal to 2?

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

    Anything divided by zero is not a real number, because division by zero is not defined. And square root of a negative is not a real number. (But ends up being useful later as an "imaginary number")

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

    Ohh okay so divided by zero is not a real number. That makes sense.

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

    Thank you. :)

  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.