1.

The sumof n terms of the series 5/(1.2). 1/3 +7/(2.3). 1/(3^(2))+9/(3.4). 1/(3^(3))+11/(4.5). 1/(3^(4))+….is

Answer»

`1 - 1/(N+1). 1/(3^(n))`
`1+1/(n+1). 1/(3^(n))`
`1-1/(n-1). 1/(3^(n+1))`
NONE of these

ANSWER :A


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