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Let a(n)=3^(n)+5^(n), nin N and let A...

Let `a_(n)=3^(n)+5^(n), nin ` N and let
`A=((a_(n),a_(n+1),a_(n+2)),(a_(n+1),a_(n+2),a_(n+3)),(a_(n+2),a_(n+3),a_(n+4)))` Then

A

0 is a root of the equation det (A-xl) =0

B

det (A) =`a_(n)a_(n+2) a_(n+4)`

C

det (A) `lt0`

D

det (A) `= a_(n)+a_(n+2)+a_(n+4)`

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A
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