The trace of the matrix A -1-570 791189 isa 17b 25c 3d 12

(a) 17 The trace of a matrix is the sum of the diagonal elements. #8756; Tr A = 1 + 7 + 9 = 17 ...

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Triangular Matrix

The trace of ...

Question

The trace of the matrix $A = [\begin{matrix} 1 & - 5 & 7 \\ 0 & 7 & 9 \\ 11 & 8 & 9 \end{matrix}]$ is
(a) 17
(b) 25
(c) 3
(d) 12

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