Find the sum of the series `31^(3) + 32^(3) + cdots +50^(3)` .

Find the sum of the series 1.n + 2 .(n-1) + 3.(n-2) + cdots + ( n-1) .2 + n.1.

Find the sum of the series (1^(3))/(1) + (1^(3)+2^(3))/(1+3)+(1^(3)+2^(3)+3^(3))/(1+3+5)+ cdots up to n terms .

If the sum of n terms of the series 2 ^(3) + 4 ^(3) + 6 ^(3) + ... is 3528, then n equals to: a)6 b)7 c)8 d)9

Find the sum to n terms of the series 3+15+35+63+ cdots .

Find the sum of n terms of the series : 5+7 +13 +31+85 + cdots .

Find the sum to infinity of the series 1-3x+ 5x^(2)+7x^(3)+ cdots oo when |x| lt 1 .

The maximum sum of the series 20 +19(1)/(3)+18 (2)/(3) + cdots is

Find the sum to n terms of the series 3//(1^(2) xx2^(2))+5//(2^(2)xx3^(2))+7//(3^(2)xx4^(2))+ cdots .

Find the sum of n terms of the series 1 + 4/5 + 7//5^(2) + 10//5^(3)+ cdots