Let \(A\) be \(n\times n\) real valued square symmetric matrix of rank 2 with…

GATE · 2017 · CS · Set 1 · Computer Science & IT

Let AA be n×nn\times n real valued square symmetric matrix of rank 2 with ∑i=1n∑j=1nAij2=50.\sum_{i=1}^{n}\sum_{j=1}^{n}A^{2}_{ij} = 50.. Consider the following statements.

I.    One eigenvalue must be in [−5,5]

II.    The eigenvalue with the largest magnitude must be strictly greater than 5

Which of the above statements about eigenvalues of AA is/are necessarily CORRECT?

  1. A.

    Both I and II

  2. B.

    I only

  3. C.

    II only

  4. D.

    Neither I nor II

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