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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 on , 3 posts by 3 people.  
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 .
Hi, The following is the differential equation for a beam on a varying-stiffness elastic foundation. Does anybody know how to solve such an equation as a closed form solution (if possible)? E*I*y(x)''''+k*y(x)/x^3=0 where k is a constant.
Started by on , 14 posts  
Should.
If the solution to that equation is all you need, it's easy to find a series expansion for it.
However I do not think your differential equation comes close to applying to the problem you.
Above.
Solve the following differential equation
Started by on , 3 posts by 3 people.  
Answer Snippets (Read the full thread at sosmath):
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Solve cauchy equation and determine the domain I see which the equation is of form: afin differential equation Your solution is a particular solution of afin equation + the solution general of associated equation, but But I have trouble getting to these...
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Answer Snippets (Read the full thread at sosmath):
Hello i need help with this, what is the differential equation for the voltage v2 (t). sorry for my english
Started by on , 7 posts by 4 people.  
To find differential equation v with KVL by substituting the equations into each other, but I need some other equation that I can't think you should set up two first order....
Know how to help! i know how it works with inductors .
Solve the following differential equation given that and
Started by on , 3 posts by 2 people.  
We are given the IVP: where and The auxiliary equation associated with the ODE is: and hence.
Hello i write the equation of a linear circuit with D operator such as before i change D to dv/dt and 1/d to integral and then differentiate it.but in this equation how can i obtain the differential equation?
Started by on , 1 posts by 1 people.  
Find a solution of x^2 u_xx + x u_x + c u = 0 (c is a real number < 0, x is non-negative)
Started by on , 18 posts by 1 people.  
Answer Snippets (Read the full thread at wilmott):
Http://en.wikipedia.org/wiki by: demha As I recall from 1st....
The solution of the equation of Cuch is c is a white noise.
In matlab how can i solve differential equation using ode45 if my initial conditions are y(1)=2? In matlab how can i solve differential equation using ode45 if my initial conditions are y(1)=2 and i dont know value of y(o)?
Started by on , 1 posts by 1 people.  
Answer Snippets (Read the full thread at yahoo):
Differential Equation help? Hi, im reviewing some course material for an upcoming exam, and i cant remember how to solve this differential equation. Heres the equation: Dy/dx + y/x = x/(y^3) If anyone could show me the steps to solve this, i would be ...
Started by on , 2 posts by 2 people.  
Answer Snippets (Read the full thread at yahoo):
Y[x] = -(((2 x^6)/3 + C)^(1/4)/x).
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