Finding the particular solution of DE

In summary, the conversation is about solving a nonhomogeneous differential equation with a particular solution of Asin(x)sin(t). The question asks for tips on using the method of undetermined coefficients, but it is determined that this method does not apply in this case. It is also noted that the question is asking for the general solution of sin(x)sin(t) in one step of the calculations. Another approach suggested is using the Fourier Series Method by separating the equation into two ordinary differential equations.
  • #1
overseastar
25
0
I have a nonhomogeneous DE and wants to find the particular solution for Asin(x)sin(t)

Is there any tips in using method of undetermined coefficient to guess the particular solution of this?
 
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  • #2
Is this a partial differential equation or is one of x and t the dependent variable so that you have a nonlinear equation? In either case "undetermined coefficients" doesn't apply here.
 
  • #3
the question is asking us to solve this nonhomogeneous problem:

Utt = Uxx + sin(x)sint(t)

and I think in one step of the calculations, we need to find the general solution of sin(x)sin(t) along with the particular solution.

Or is there another way to approach this question?
 
  • #4
Stipulate that U(x,t)=X(x)T(t). Then you can separate into 2 ODEs.
 
  • #5
Sorry, I guess I should be more specified.
It asked us to use the Fourier Series Method.
 

FAQ: Finding the particular solution of DE

What is a particular solution of a differential equation?

A particular solution of a differential equation is a specific function that satisfies the given differential equation. It is a solution that satisfies both the differential equation and any initial or boundary conditions that are given.

How do you find the particular solution of a differential equation?

The method for finding the particular solution of a differential equation depends on the type of differential equation. For linear differential equations, the method involves finding the general solution and then using initial or boundary conditions to determine the specific constants. For nonlinear differential equations, there are various methods such as separation of variables, substitution, or using a series to approximate the solution.

Why is finding the particular solution important?

Finding the particular solution of a differential equation is important because it allows us to determine the specific function that describes the behavior of a system. This can be useful in many fields such as physics, engineering, and economics, where differential equations are commonly used to model real-world phenomena.

What is the difference between a general solution and a particular solution?

A general solution of a differential equation is a solution that contains one or more arbitrary constants. It can represent a family of solutions that satisfy the given differential equation. On the other hand, a particular solution is a specific solution that satisfies both the differential equation and any initial or boundary conditions that are given.

Can there be more than one particular solution to a differential equation?

Yes, there can be more than one particular solution to a differential equation. This can occur when the differential equation is nonlinear or when there are multiple initial or boundary conditions that need to be satisfied. In these cases, there may be multiple solutions that satisfy the given conditions and are considered particular solutions.

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