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

melmel Group Title

answred

  • 11 months ago
  • 11 months ago

  • This Question is Closed
  1. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    to find y any method

    • 11 months ago
  2. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    bernoulli equation or homogeneous

    • 11 months ago
  3. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    can you help me @.Sam.

    • 11 months ago
  4. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[xdx + ( y -2x)dy= 0\] \[xdx=-(y-2x)dy \\ -\frac{x}{y-2x}=\frac{dy}{dx}\] --------------------------------------- Try using y=vx Then \[\frac{dy}{dx}=v+x\frac{dv}{dx}\]

    • 11 months ago
  5. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Replace the y and \(\frac{dy}{dx}\) to v and the one given above \[-\frac{x}{vx-2x}=v+x\frac{dv}{dx} \\ \frac{1}{2-v}=v+x\frac{dv}{dx}\]

    • 11 months ago
  6. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yes then?

    • 11 months ago
  7. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    the numerator can break it for the denomentor?

    • 11 months ago
  8. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Then set all v into the other side \[\frac{1-2v+v^2}{(2-v)x}=\frac{dv}{dx} \\ \frac{(2-v)x}{1-2v+v^2}=\frac{dx}{dv} \\ \int\limits \frac{(2-v)}{1-2v+v^2} dx=\int\limits \frac{1}{x}dx\]

    • 11 months ago
  9. .Sam. Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Should be dv \[\int\limits\limits \frac{(2-v)}{1-2v+v^2} dv=\int\limits\limits \frac{1}{x}dx\]

    • 11 months ago
  10. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i think you get stuck here though...no way to solve for "v" the integral gives a fraction and a log

    • 11 months ago
  11. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i think we can use here synthetic division

    • 11 months ago
  12. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    my Im right?

    • 11 months ago
  13. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @melmel , no that only works if the "2-v" was in denominator

    • 11 months ago
  14. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    http://www.wolframalpha.com/input/?i=integral+%282-v%29%2F%28v%5E2-2v%2B1%29

    • 11 months ago
  15. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    turns out you can't solve for "y" directly http://www.wolframalpha.com/input/?i=y%27%28x%29+%3D+x%2F%282x-y%28x%29%29

    • 11 months ago
  16. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    can you help me to solve and to prove that?

    • 11 months ago
  17. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @.sam, already did but you cant go any further just sub in y/x for v

    • 11 months ago
  18. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so what is my final answer?

    • 11 months ago
  19. dumbcow Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i dunno depends on the instructions...ther is no "y =" answer

    • 11 months ago
  20. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    CAN YO HELP ME @zepdrix

    • 11 months ago
  21. melmel Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    coefficients by division?

    • 11 months 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.