1.

If S_(n)=81+54+36+24+.. upto n terms, then value of x=(S_(n)-4S_(n-1)+6S_(n-2)-4S_(n-3)+S_(n-4))/(S_(n-1)-4S_(n-2)+6S_(n-3)-4S_(n-4)+S_(n-5)) is equal

Answer»

`(2)/(3)`
`(3)/(2)`
`(1)/(2)`
2

Answer :A


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