If the sum of the series `1+(3)/(2)+(5)/(4)+(7)/(8)+……+((2n-1))/((2)^(n-1))` is `f(n)`, then the value of `f(8)` is

The sum to n terms of the series (1)/(2) + (3)/(4) + (7)/(8) + (15)/(16)+…. is equal to :

If S denotes the sum to infinity and S_(n) , denotes the sum of n terms of the series 1+(1)/(2)+(1)/(4) + (1)/(8)+ cdots , such that S-S_(n) lt (1)/(100) , then the least value of n is

The sum to n terms of the series (1)/(2)+(3)/(4)+(7)/(8)+(15)/(16)+....isgivenby

The sum of the series sum _( n =8) ^( 17) (1)/((n +2) (n +3)) is equal to

The sum of the first n terms of the series (1)/(2)+(3)/(4)+(7)/(8)+(15)/(16)+.... is equal to