Solving a Differential Equation with Boundary Conditions

In summary, a differential equation is a mathematical equation that relates an unknown function to its derivatives, used to model relationships between continuously changing quantities. Boundary conditions are additional information given to help determine the specific solution, specifying the values or behavior of the unknown function at certain points or intervals. To solve a differential equation with boundary conditions, one must determine the general solution and use the given conditions to find the specific solution. Boundary conditions are important because they provide specific information for finding the unique solution. Multiple sets of boundary conditions can be used for a single differential equation, resulting in different specific solutions.
  • #1
kumudumalee
2
0
What is the answer of this differential equation.

((d^2) r)/((ds)^2) +(m/(r^2)) -(nr/3)=0

the boundary conditions (i) r=a when s=0 and (ii) dr/ds =0 when r=b.

m and n are constants.
 
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  • #2
hi kumudumalee! welcome to pf! :smile:

(try using the X2 button just above the Reply box :wink:)

multiply the whole equation by dr/ds, and then integrate :smile:
 
  • #3
Thanks...
 

Related to Solving a Differential Equation with Boundary Conditions

1. What is a differential equation?

A differential equation is a mathematical equation that relates an unknown function to its derivatives. It is used to model relationships between quantities that change continuously over time or space.

2. What are boundary conditions?

Boundary conditions are additional information given in a differential equation that help determine the specific solution. These conditions specify the values or behavior of the unknown function at certain points or intervals.

3. How do you solve a differential equation with boundary conditions?

To solve a differential equation with boundary conditions, you need to first determine the general solution of the equation. Then, use the given boundary conditions to determine the specific solution that satisfies those conditions. This can be done through various methods such as separation of variables, substitution, or using an integrating factor.

4. Why is it important to have boundary conditions when solving a differential equation?

Boundary conditions are important because they provide specific information that helps determine the unique solution to a differential equation. Without boundary conditions, the general solution may have multiple possible solutions, making it difficult to find the correct one.

5. Can you have multiple sets of boundary conditions for one differential equation?

Yes, it is possible to have multiple sets of boundary conditions for a single differential equation. This may occur when the equation models a physical system with multiple parameters or constraints. Each set of boundary conditions will result in a different specific solution to the equation.

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