1.

Which of the following is a scalar matrix?

A. A=\(\begin{bmatrix}2&0&0\\0&2&0\\0&0&2\end{bmatrix}\)
B. A=\(\begin{bmatrix}1&1&1\\1&1&1\\1&1&1\end{bmatrix}\)
C. A=\(\begin{bmatrix}7&0&0\\0&2&0\\0&0&5\end{bmatrix}\)
D. A=\(\begin{bmatrix}2&1&5\\8&1&2\\2&4&8\end{bmatrix}\)
Answer» B. A=\(\begin{bmatrix}1&1&1\\1&1&1\\1&1&1\end{bmatrix}\)


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