Need Help Solving These ODE Problems?

  • Context: Undergrad 
  • Thread starter Thread starter prison-rat
  • Start date Start date
  • Tags Tags
    Ode
Click For Summary

Discussion Overview

The discussion revolves around solving ordinary differential equations (ODEs) presented by a user seeking assistance. The scope includes problem-solving techniques and clarification of specific ODEs, with a focus on understanding and verifying solutions.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • The original poster presents four ODE problems and requests help in solving them.
  • Another participant encourages the original poster to share their attempted solutions to better guide assistance.
  • The original poster indicates they have attempted problems 1 and 2 but expresses uncertainty about their correctness.
  • A participant points out an error in the integration step for problem 2b, suggesting a substitution method instead.
  • Another participant notes that problems 3 and 4 appear standard and inquires if the original poster understands the concept of "exact differential."
  • For problem 4, a participant observes that the characteristic equation lacks odd powers, which may be relevant to the solution approach.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the correctness of the original poster's solutions, and multiple viewpoints regarding the methods to solve the problems are presented.

Contextual Notes

There are indications of missing details in the original poster's attempts, such as specific steps taken in their solutions and the definitions or concepts they may not fully grasp.

Who May Find This Useful

Students or individuals working on ordinary differential equations, particularly those seeking collaborative problem-solving and clarification of mathematical concepts.

prison-rat
Messages
2
Reaction score
0
Hi. I have some important questions to solve until tomorrow night..

Can anyone solve them please ?

05.JPG



01
http://img356.imageshack.us/img356/4218/01hz1.jpg

02
http://img356.imageshack.us/img356/4851/02yn6.jpg

03
http://img356.imageshack.us/img356/5762/03pm9.jpg

04
http://img204.imageshack.us/img204/7753/04gr4.jpg



Thank you
 
Last edited by a moderator:
Physics news on Phys.org
Welcome to PF!

Hi prison-rat! Welcome to PF! :smile:

Show us what you've done and where you're stuck, and then we'll know how to help you! :wink:

Start with question 1. :smile:
 
thanks for your reply.

I solved 1-2 but ımnot sure the re true.
3-4 I am trying
here first 2

http://img514.imageshack.us/img514/3762/answer1rt7.jpg
thanks
 
Last edited by a moderator:
You are fine until 2b
[tex]\int \frac{dy}{1- 2y}\ne ln(1- 2y)+ C[/tex]
Let u= 1- 2y and substitute.
 
Numbers 3 and 4 look fairly standard. Do you know what an "exact differential" is?

For number 4, notice that there are no odd powers in the characteristic equation.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
Replies
24
Views
4K
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 23 ·
Replies
23
Views
10K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K