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If A=([a(i j)])(4xx4,) such that a(i j)=...

If `A=([a_(i j)])_(4xx4,)` such that `a_(i j)={2,w h e ni=j0,w h e ni!=j ,t h e n{("det"(a d j(a d jA)))/7}` is (where {.} represents fractional part function) `1//7` b. `2//7` c. `3//7` d. none of these

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If A=[a_("ij")]_(4xx4) , such that a_("ij")={(2",","when "i=j),(0",","when "i ne j):} , then {("det (adj (adj A))")/(7)} is (where {*} represents fractional part function)

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