If A = \left[\begin{array}{ccc}1 & 2 & 3 \ \\\\text{ }\\\3 & 4 & 5 \ \\\\text{ }\\\5 & 6 & 7 \ ]\end{array} and B = \left[\begin{array}{ccc}1 & 1 & 1 \ \\\\text{ }\\\2 & 2 & 2 \ \\\\text{ }\\\3 & 3 & 3 \ ]\end{array}, then det(A + B) = ?

AAI ATC Junior Executive 21 Feb 2023 Shift 1 Paper

Question : 93 of 120

Marks: +1, -0

A = {[\table 1 , 2 , 3 ; \;\text " "\;3 , 4 , 5 ; \;\text " "\;5 , 6 , 7 ; ]}

and

B = {[\table 1 , 1 , 1 ; \;\text " "\;2 , 2 , 2 ; \;\text " "\;3 , 3 , 3 ; ]}

, then det(A + B) = ?

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