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Questions  

 If A=aij4×4, such that aij=2, when i=j0, when ij , then det(adj(adjA))7 is (where {.} represents fractional part function)

a
17
b
27
c
37
d
47

detailed solution

Correct option is A

From given data |A|=24⇒adjadj  A=249=236⇒detadjadj A7=2367=7+1127=17

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