1.

The sum of the series S= overset(n)underset(r=1)Sigma log ((a^(r+1))/(b^(r-1))) is

Answer»

`(n)/(2)LOG((a^(n-1))/(b^(n)))`
`(n)/(2)log((a^(n+3))/(b^(n-1)))`
`(n)/(2)log((a^(n-+2))/(b^(n-1)))`
none of these

Answer :B


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