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GATE Civil 2024 Set 1 | Question: 26

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​​​​​What are the eigenvalues of the matrix $\left[\begin{array}{lll}2 & 1 & 1 \\ 1 & 4 & 1 \\ 1 & 1 & 2\end{array}\right]$ ?

  1. $1,2,5$
  2. $1,3,4$
  3. $-5,1,2$
  4. $-5,-1,2$
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