1.

Let a_(n)=3^(n)+5^(n), ninN 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

Answer»

0 is a root of the EQUATION DET (A-xl) =0
det (A) =`a_(N)a_(n+2) a_(n+4)`
det (A) `lt0`
det (A) `= a_(n)+a_(n+2)+a_(n+4)`

ANSWER :A


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