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Solve the differential equation :
Started by sayak38kolay on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at artofproblemsolving):
Multiplying with makes the equation homogeneous..
Equation is not homogeneous.
Solution.
Sonnhard.
Mcrasher
You have solved hello, this is a Bernoulli-equation.
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I've encountered a problem while trying to use the answer from a NDSolve in two separate plot commands. To illustrate the problem, I'll use a simple differential equation and only one plot command. If I write something like this:
{Plot[x[t], {t, 0, 10...
Started by Yuval Elhanati on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
So in the expression you posted,
Plot[x[t], {t, 0, 10}]
just goes ahead and evaluates... .
Your problem is that Plot[] does some funny things to make plotting more convenient, and one of the things it does is just not plot things it can't evaluate numerically .
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I have to solve the following differential equation:
where you assume solutions of the form:
, , , are constants and is the imaginary unit.
Could someone please tell me how to obtain explicit expressions for , , , ?
I got as far as rewriting the assumed...
Started by Caluca on
, 12 posts
by 2 people.
Answer Snippets (Read the full thread at mymathforum):
The reason why I need to have is NOT time dependent... .
Of course, the differential equation has analytic solutions, but NONE on the form differential equations and dynamical systems, Ferdinand Verhulst).
For something impossible.
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I'm trying to solve a partial differential equation which I derived from the Navier-Stokes equation:
With the following B.C.'s:
B.C. 1:
B.C. 2:
B.C. 3:
While solving it I get stuck and I'm wondering if this is the right method to solve the equation. Especially...
Started by outermeasure on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at sosmath):
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Differential equation
I'm stuck on how to solve d^2y/dx^2=-2*x*y*(dy/dx)
I've tried substituting y=vx or v=dy/dx, but don't seem to be getting anywhere!
Any help really appreciated, thanks! :)
Started by Bizarre on
, 5 posts
by 3 people.
Answer Snippets (Read the full thread at thestudentroom):
So let y = kx^-2 and ....
Re: Differential equation infront.
Re: Differential equation
I've found if you integrate both sides with respect to x (using parts a couple of times) then you can show that dy/dx does not depend on x.
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I have the following differential equation:
and I need to find the general solution.
I end up with:
And from here I can't solve in terms of y (because it's non-linear). How can I proceed?
Started by dunn on
, 3 posts
by 2 people.
Answer Snippets (Read the full thread at mymathforum):
I figured the following....
Separate variables:
Integrate:
Now, you can solve for y.
Separate variables:
Integrate:
Now, you can solve for y.
I think you may have the incorrect set up at the end .
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Find a second order DE y=ax^3+bx^-2? Differential Equation? Find a second order DE y=ax^3+bx^-2
Any body know how to do this im lost so im turning to yahoo answers ha ha
Started by joshi on
, 2 posts
by 2 people.
Answer Snippets (Read the full thread at yahoo):
I hope.
X^4)
The latter is then a second-order DE for which the given equation is a solution.
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Differential Equation Question I'm doing some differentiation questions and I got this one wrong, but I'm not sure why.
I have to find the general solution of
The first thing I did was to move the to the same side
Then I took it out as a common factor...
Started by Sound of Rainbows on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at thestudentroom):
Re: Differential Equation Question
Note
Using logs properties...
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Hi guys, just embarking on the journey of modeling with differential equations and solving them. I have a more conceptual quesiton. Linear differential equations in my book are defined to be ones where F(t, y, y', y'',...,yn) = 0 is a linear function ...
Started by sergey90 on
, 1 posts
by 1 people.
Answer Snippets (Read the full thread at physicsforums):
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I rewrote the equation in form;
And used integration factor method to solve for y (lengthy process.)
Then I used integration by parts for and
Is there a shorter way of solving this type of equation?
Started by sivela on
, 4 posts
by 2 people.
Answer Snippets (Read the full thread at mymathforum):
What other long way is there? The method of undetermined coefficients .
Not really.
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