The matrix A = \(\begin{pmatrix}2&-2&-4 \\- 1 &3&4\\1&-2&-3\end{pmatr – InterviewSolution

1.

The matrix A = \(\begin{pmatrix}2&-2&-4 \\- 1 &3&4\\1&-2&-3\end{pmatrix}\) isA. Nonsingular B. Idempotent C. Nilpotent D. Orthogonal

Answer»

Here the diagonal value is 2 + 3 - 3 = 1

So the given matrix is idempotent.

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