# I Normal Modes Question

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1. Mar 26, 2016

### Sum Guy

If I have a system where the following is found to describe the motion of three particles:

The normal modes of the system are given by the following eigenvectors: $$(1,0,-1), (1,1,1), (1,-2,1)$$
How can I find the corresponding eigenfrequencies? It should be simple... What am I missing?

2. Mar 26, 2016

### Staff: Mentor

Is this for schoolwork?

3. Mar 26, 2016

### Sum Guy

This is something I found in a pdf online where it simply asserted what the eigenfrequencies were... and not how to find them.