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

INT Group Title

f(x,y)=sqrt(y-x) Find the boundary of the function's domain.

  • one year ago
  • one year ago

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

    what have you tried so far?

    • one year ago
  2. INT Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I know it has something to do with interior points and boundary points, but I dont get it. My current understanding is that interior points are arbitrary points in the function's range that if we make them the center of a disk with positive radius, all the points in that disk are also in R. Then boundary points are the same except that the disk has some points inside R and some outside R. --- This doesnt make sense to me because wouldn't it depend on how big the radius of the disk is? how do you know how big the radius is?

    • one year ago
  3. remnant Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Okay, so you have,\[\large f(x, y) = \sqrt{y-x}\] and you want to try and find the boundary of the domain. So, you want to find out when this function is valid. So when is it? Well, we know that for the square root of anything, that anything must be greater to or equal to zero so we have,\[y - x \ge 0\] so,\[y \ge x\]

    • one year ago
  4. INT Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah, I've gotten that so far.

    • one year ago
  5. remnant Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1352071930007:dw|

    • one year ago
  6. remnant Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    that is where the function would be valid, whcih means that the boundary of the func's domain would be the line y=x

    • one year ago
  7. INT Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so basically it's just graphing the domain inequality.

    • one year ago
  8. remnant Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Seems to be that way, yes

    • 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.