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

kevin7ama

im having trouble integrating the double iterated integral R= [0,3] X [0,rad(9-y^2)] and the function inside the integral is "y dy dx"

  • one year ago
  • one year ago

  • This Question is Open
  1. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\int\limits_{0}^{3}\int\limits_{0}^{\sqrt{9-7^{2}}} y dy dx\] thats the integral

    • one year ago
  2. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    something's not right with either your limits or your order of integration...

    • one year ago
  3. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry your right.... its y dx dy

    • one year ago
  4. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    if you're integrating in 'dy' .. your limits will be functions of x

    • one year ago
  5. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    ok

    • one year ago
  6. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    that works...

    • one year ago
  7. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    integral of ydx is yx +C

    • one year ago
  8. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    ive tried u sub...and integration by parts. but i just cant get the answer....

    • one year ago
  9. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    still something weird about it though... shouldn't be written like that...

    • one year ago
  10. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    the problem just says.... evaluate the iterated integral

    • one year ago
  11. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    k

    • one year ago
  12. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    they're writing it weird to try and throw you off I guess...

    • one year ago
  13. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    anyway... plug in the limits on 'x' ... ( 0 ... srt(9-y^2) ) and then evaluate with respect to dy

    • one year ago
  14. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    but then what? dont we need to simplifly

    • one year ago
  15. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    so (y*sqrt(9-y^2) + C) dy

    • one year ago
  16. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    you can use u sub.s ...

    • one year ago
  17. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    9-y^2 = u -2y dy = du y dy = -du/2

    • one year ago
  18. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    yes but then we need to plug in 3 into \[\sqrt{9-3^{2}}\] wich equals 0 in the rad

    • one year ago
  19. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    so?

    • one year ago
  20. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    ends up canceling everything out.... and the answer is supposed to be 3

    • one year ago
  21. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    ...

    • one year ago
  22. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    lower limit?

    • one year ago
  23. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    is 0

    • one year ago
  24. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    omg....

    • one year ago
  25. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    ive done this problem like no lie 10 times and i never pluged in the lower limit = 0 giving me the right answer 9

    • one year ago
  26. kevin7ama
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you so much for letting me realize this. how to i give a medal??

    • one year ago
  27. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 1

    click 'best response'

    • 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.