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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