Questions

Among the following, not a scalar matrix is

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a

$\left[\begin{array}{cc}5& 0\\ 0& 5\end{array}\right]$

b

$\left[\begin{array}{cc}2& 0\\ 0& 2\end{array}\right]$

c

$\left[\begin{array}{cc}0& 2\\ 2& 0\end{array}\right]$

d

$\left[\begin{array}{cc}1& 0\\ 0& -1\end{array}\right]$

detailed solution

Correct option is D

A Square Matrix is called a Scalar Matrix, if all its non diagonal elements are zero and all diagonal elements are equal.

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