First slide

Operations of matrix

Question

If $A = [\begin{matrix} 1 & - 5 & 7 \\ 0 & 7 & 9 \\ 11 & 8 & 9 \end{matrix}]$ ,then trace of matrix A, is

Easy

Solution

$A = [\begin{matrix} 1 & - 5 & 7 \\ 0 & 7 & 9 \\ 11 & 8 & 9 \end{matrix}] t r a c e o f A = 1 + 7 + 9 = 17$

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