firstly go through the attachment. now answer that which of the following options is/are correct.
(1) X is a symmetric matrix.
(2) if , then α = 30
(3) sum of diagonal entries of X is 18.
(4) X-30 I is an invertible matrix.
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firstly go through the attachment. now answer that which of the following options is/are correct.
(1) X is a symmetric matrix.
(2) if \begin{gathered}\sf x \begin{array}{c} \sf 1 \\\sf 1 \\\sf 1 \end{array} = \alpha \begin{array}{c} \sf 1 \\\sf 1 \\\sf 1\end{array}\end{gathered}
x
1
1
1
=α
1
1
1
, then α = 30
(3) sum of diagonal entries of X is 18.
(4) X-30 I is an invertible matrix.
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