Gerschgorins theorem in eigenvalue problem

[raymondp44]

Hi. I was wondering if anyone can give me advice on how to answer the following question.

Use Gerschgorin's theorem to show the effect of increasing the size of the matrix in your solution to the eigenvalue problem: y''+lambda*y=0 y(0)=y(1)=0

Thanks

Main issue is that I don't really know how to solve the eigenvalue problem.

 

[Meteorologist]

Is this all the given information?