A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Need help with the washer method: x=1-y^2, x=2+y^2, =-1, y=1

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

    *should be y=-1

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

    x=-1 , y=-1?

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

    try out this website. http://tutorial.math.lamar.edu/Classes/CalcII/CalcII.aspx

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

    So you have two function. Find out which one is to the right.

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

    x=2+y^2 would be to the right, right?

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

    hold on

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

    are your functions correct, they don't seem to intersect

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

    yep, they are correct. I also forgot to put its revolved around the y-axis

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

    because the functions don't even touch each other

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

    That's really strange, I wonder if the text made an error

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

    For washer method, we are supposed to take revolution of intersection between two functions

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

    That much I understand, maybe I should try converting the equation to xs and see what happens.

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

    If we change second function to x=-2+y^2 we can solve it, do you wanna

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

    sure : )

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

    We will rotate around x=-3

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

    Here come the integral \[\pi \int\limits_{?}^{?}((-y^2-1)-(y^2-2)+1)^2-1\]

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

    dy

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

    did you get it, mathrocks?

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

    Ok, this is starting to make some sense.

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

    you have to find points of intersection though

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

    Never memorize any formula for disc,shell, washer method

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

    I can find the intersection points with no problem. It's just setting up the washer equation that sometimes trips me up. Thanks for your help, I appreciate it.

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

    just know that when you are doing this type of problem, you are adding up circle

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

    If I helped you in somehow, can you fan me

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

    I'll remember that and will practice drawing the actual graphs. And the fan request has been done. : )

  26. 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.