Sum the series 1+5+14+30+…… upto n terms.

Find the sum of the series – 1 + 5 + 11 +….to n terms.

Find the sum of the series 1^2+3^2+5^2+ ton terms.

Find the sum of the series upto n terms 0.b+0.b b+0.b b b +0.b b b b+"......",AA " b" in N " and "1 le b le 9.

Find the sum of the following series up to n terms: .6+. 66 +. 666+...

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

What is the sum of this series upto infinite terms -8,-4,-2,-1,-(1)/(2),"…"

Sum up the following series to n terms : 3+7+ 14+ 24+ 37 + .....

Find the sum of the series : 11 + 103 + 1005 +.... to n terms.

Find the sum of the following series : 1.3+3.5+5.7+ .... to n terms .