Question:
Which one of the following is a scalar matrix?
A. $\left(\begin{array}{ll}1 & 1 \\ 1 & 1\end{array}\right)$
B. $\left(\begin{array}{ll}6 & 0 \\ 0 & 3\end{array}\right)$
c. $\left(\begin{array}{cc}-8 & 0 \\ 0 & -8\end{array}\right)$
D. None of these
Solution:
