Define eigenvalue method for solving the system x' = Ax?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter10: Matrices
Section10.CR: Chapter 10 Review
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Define eigenvalue method for solving the system x' = Ax?

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Step 1

Let A is a 2*2 matrix. To solve the given system x’ = A x. First find the trace, determinant and discriminant for the given matrix A.

 

Now,

Calculus homework question answer, step 1, image 1

Step 2

This system has a non-trivial solution for x1 and x2 only if the determinant of coefficient is zero and we can obtain the characteristic equation. And we can find the Eigen value for the system:

Calculus homework question answer, step 2, image 1

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