Solving a systems of differential equations in terms of x(t) and y(t)

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SUMMARY

The discussion focuses on solving the system of differential equations represented by x' = {{-1,1},{-4,3}}*x, with the initial condition x(0) = {{1},{1}}. The correct approach involves expressing the solution in the form x(t) = x0e^{λt}, where x0 is the initial vector and λ represents the eigenvalues of the matrix A. The user initially provided an incorrect solution format and sought clarification on how to properly express the solution in terms of x(t) and y(t). The community emphasized the need to determine the eigenvalues and eigenvectors to solve the system accurately.

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  • Understanding of linear algebra concepts, specifically eigenvalues and eigenvectors.
  • Familiarity with matrix exponentiation and its application in solving differential equations.
  • Knowledge of the theory behind systems of differential equations.
  • Proficiency in using mathematical notation and expressions for clarity in problem-solving.
NEXT STEPS
  • Learn how to compute eigenvalues and eigenvectors for a given matrix.
  • Study the method of solving systems of differential equations using matrix exponentiation.
  • Explore the application of the exponential matrix in solving linear differential equations.
  • Review examples of similar differential equations to reinforce understanding of solution techniques.
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Students studying differential equations, mathematicians, and anyone interested in the application of linear algebra to solve systems of differential equations.

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Homework Statement



x' ={{-1,1},{-4, 3}}*x, with x(0) = {{1},{1}}

Solve the differential equation where x = {{x(t)}, {y(t)}}

Homework Equations


The Attempt at a Solution



I have e^t*{{1},{-2}} + e^t*{{t},{2t+1}}

but I'm not sure how to get it in terms of what it's asking.Edit: Please quick if you know how to do it. It's due at 4 AM :/ Crazy week on my end.
 
Last edited:
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x'=Ax is solved by solutions of the form x(t)=x0e^{λt} where x0 is some initial vector, not the form you gave. You need to find out x0 and λ. I've seen this question quite a few times recently
 

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