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1 of 8 0-day streak

Identify row, column, square, symmetric and zero matrices

Question 1 of 8

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Four matrices are shown below

\[A = \begin{bmatrix} 1 & 4 & 9 \end{bmatrix}\]
\[B = \begin{bmatrix} 0 & 0 \\ 0 & 0 \\ 0 & 0 \end{bmatrix}\]
\[C = \begin{bmatrix} -1 \\ -7 \\ -5 \\ -8 \end{bmatrix}\]
\[D = \begin{bmatrix} -2 & 2 & -9 \\ 0 & -6 & -9 \\ 4 & -8 & -5 \end{bmatrix}\]
1 mark

Which of the matrices \(A\) to \(D\) is a square matrix?