Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

melmel Group TitleBest ResponseYou've already chosen the best response.0
to find y any method
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
bernoulli equation or homogeneous
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
can you help me @.Sam.
 11 months ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
\[xdx + ( y 2x)dy= 0\] \[xdx=(y2x)dy \\ \frac{x}{y2x}=\frac{dy}{dx}\]  Try using y=vx Then \[\frac{dy}{dx}=v+x\frac{dv}{dx}\]
 11 months ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
Replace the y and \(\frac{dy}{dx}\) to v and the one given above \[\frac{x}{vx2x}=v+x\frac{dv}{dx} \\ \frac{1}{2v}=v+x\frac{dv}{dx}\]
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
the numerator can break it for the denomentor?
 11 months ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
Then set all v into the other side \[\frac{12v+v^2}{(2v)x}=\frac{dv}{dx} \\ \frac{(2v)x}{12v+v^2}=\frac{dx}{dv} \\ \int\limits \frac{(2v)}{12v+v^2} dx=\int\limits \frac{1}{x}dx\]
 11 months ago

.Sam. Group TitleBest ResponseYou've already chosen the best response.0
Should be dv \[\int\limits\limits \frac{(2v)}{12v+v^2} dv=\int\limits\limits \frac{1}{x}dx\]
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.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

melmel Group TitleBest ResponseYou've already chosen the best response.0
i think we can use here synthetic division
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
my Im right?
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.0
@melmel , no that only works if the "2v" was in denominator
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.0
http://www.wolframalpha.com/input/?i=integral+%282v%29%2F%28v%5E22v%2B1%29
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.0
turns out you can't solve for "y" directly http://www.wolframalpha.com/input/?i=y%27%28x%29+%3D+x%2F%282xy%28x%29%29
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
can you help me to solve and to prove that?
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.0
@.sam, already did but you cant go any further just sub in y/x for v
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
so what is my final answer?
 11 months ago

dumbcow Group TitleBest ResponseYou've already chosen the best response.0
i dunno depends on the instructions...ther is no "y =" answer
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
CAN YO HELP ME @zepdrix
 11 months ago

melmel Group TitleBest ResponseYou've already chosen the best response.0
coefficients by division?
 11 months ago
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
 Engagement 19 Mad Hatter
 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.