Sum the series 1+3+7+13+……. Upto n terms.

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

Find the sum of the series : 1+ 2/3+1/3+0 +…….. To 19 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 series : 11 + 103 + 1005 +.... to n terms.

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

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

Find the sum of the following series : 1^3+3^3+5^3 + .... to n terms .

Find the sum of the following series : 1.2+2.3+3.4+ .... to n terms .

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) +....