A community for students.
Here's the question you clicked on:
 0 viewing
Mimi_x3
 one year ago
help pls...i have no clue about this course
Mimi_x3
 one year ago
help pls...i have no clue about this course

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I can't open it, seems I need a proxy

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sure you know that you need a substitution, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sub \(y_1=f(x_1, x_2)\) and \(y_2=g(x_1, x_2)\) in a way that first two equations turn into second system in terms of \(y\)

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1I really don't know...can you please elaborate

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1I can't find anything related to this on google :/

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let \(y_1=x_1\) and \(y_2=x_1+x_2\) see what happens

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1do i sub it into x dot?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sry, I was out, see for example\[\dot{y_1}=\dot{x_1}=x_1+x_2=y_2\]Now you calculate \(\dot{y_2}\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hey dont overthink it, this is just some algebraic manipulation, Its not weird

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1I don't get it why does y dot = x dot?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Its a dynamical system, dot is "derivative with respect to time" here

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Now, what about \(\dot{y_2}\) ?

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1I don't get how the x is related to the y?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.0the dot isn't used that much , but it's another way of saying first derivative for a single dot 2nd derivative for a double dot.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That depends on how we define y in terms of x, we do this sub to get a simpler form of equations that are easy to interpret physically

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Think of it like this, you have a system of differential equations in x_1 and x_2 and you wanna solve it, you do a sub to get a simpler form and to solve it more easily

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And x is not related to y, we relate it to y :)

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1i don't get it y dot = (2x + x)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, let me explain it step by step

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you have these system of equations:\[\dot{x_1}=x_1+x_2 \]\[\dot{x_2}=2x_1x_2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Now I do a sub in the form \(y_1=x_1\) and \(y_2=x_1+x_2\), lets see what happens

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\dot{y_1}=\dot{x_1}=x_1+x_2=y_2\]\[\dot{y_2}=\dot{x_1}+\dot{x_2}=x_1+x_22x_1x_2=x_1=y_1\]

Mimi_x3
 one year ago
Best ResponseYou've already chosen the best response.1how would you know what sub to do

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's just like integrals, how do you solve integrals with usub?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No problem, skill develops with practice and experience
Ask your own question
Sign UpFind more explanations on OpenStudy
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.