The 15th term of the series `2 1/2+1 7/(13)+1 1/9+(20)/(23)+..` is

Find the sum up to the 17^(th) term of the series (1^3)/(1) + (1^3 + 2^3)/(1+3) + (1^3 + 2^3 + 3^3)/(1+3+5)+ ….

Find the sum upto the 17^(th) term of the series 1^(3)/1 + (1^(3)+2^(3))/(1+3) + (1^(3)+2^(3)+3^(3))/(1+3+5)+...

The n^(th) term of the sequence 1, 2, 4, 7, 11, … is

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

The sum of the first 9 terms of the series 1^3/1 + (1^3 + 2^3)/(1+3) + (1^3 + 2^3 +3^3)/(1 + 3 +5) ..... is :

The 8th term of the G.P. 9, 3, 1, ____.

The 8th term of the sequence 1,1,2,3,…… is ……….