1.

Find the sum to first n terms : 1+2/3 + 3/(3^2) + 4/(3^3)+….

Answer»

a)`3/4 - (3+2N)/(4(3^(n-1)))`
b)`9/4 - 3/4 [(3+2n)/(3^n)]`
c)`2n - (1/n)^2`
d)NONE of these

Answer :B


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