In a skew symmetric matrix, the diagonal elements are all
Different from each other
Zero
One
None of these
(b)It is obvious.
Let $A$ be a symmetric matrix of order $2$ with integer entries. If the sum of the diagonal elements of $A ^{2}$ is $1,$ then the possible number of such matrices is
If $A = \left[ {\begin{array}{*{20}{c}}0&1&{ – 2}\\{ – 1}&0&5\\2&{ – 5}&0\end{array}} \right]$, then
If $A$ and $ B$ are square matrices of the same order, then
Let $ A$ be a skew- symmetric matrix of odd order, then $ |A| $ is equal to
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