Find `1+ 1/(1+2)+1/(1+2+3)+….. to n` terms.

1 + (1 +2) + (1 + 2 + 3) + …. To n term is

Find the sum of the following series : 1+(1+2)+(1+2+3) + .... to n terms .

Find the sum: 1 + (1)/(2) (1 + 2) + (1)/(3) (1 + 2 + 3) + ……up to 16 terms.

(1^(2) )/( 1) + (1^(2) + 2^(2) )/(1+2) + (1^(2) + 2^(2) + 3^(2) )/( 1+ 2+ 3)+ …. + n terms =

Find 1^2/1 + (1^2 + 2^2) / 2 + (1^2 + 2^2 + 3^2) / 3 + …..upto n terms.

(i) 1+(1+2)+(1+2+3)+………. to n terms. (ii) 1^(2)+(1^(2)+2^(2))+(1^(2)+2^(2)+3^(2))+ ………………to n terms.

Sum of the series 1+(1+2)+(1+2+3)+(1+2+3+4)+... to n terms be 1/m n(n+1)[(2n+1)/k+1] then find the value of k+m

Find the sum of 1^1 n + 2^2 (n - 1) + 3^2 (n - 2) + 4^2 (n -3) ……upto 'n' terms.

Find the sum (1-1/n)+(1-2/n)+(1-3/n) +........upto n terms.