[" Find the sum of the first "20" terms of the "],[" sequence: "],[1+2(1+(1)/(n))+3(1+(1)/(n))^(2)+4(1+(1)/(n))^(3)+.........]

Find the sum of the first n terms ofthe sequence: 1+2(1+(1)/(n))+3(1+(1)/(n))^(2)+4(1+(1)/(n))^(3)+

The sum of n terms of the series 1+2 (1 + (1)/(n)) +3 (1+ (1)/(n))^(2) + ….is

Sum to n terms of the series :1 + 2 (1 + (1)/(n)) + 3 (1 + (1)/(n )) ^(2) + ………

Find the sum of the first n terms of the arithmetic sequence 1/n,3/n,5/n,7/n ,.......

Find the sum of the first 20 terms of the sequence shown below: (1)/(1(1+1))+(1)/(2(2+1))+(1)/(3(3+1))+(1)/(4(4+1))+...+(1)/(20(20+1))

Find the first 4 terms and the 20th term of the sequence whose S_(n) = (3)/(2) (3^(n)-1).

Find the sum of the n terms of the sequence (1)/(1+1^(2)+1^(4))+(2)/(1+2^(2)+2^(4))+(3)/(1+3^(2)+3^(4))+

Find the sum of first n term of the following series 1+(1+3)+(1+3+3^2)+ ….