" 3.Sum the series "(2)/(9)+(1)/(3)+(1)/(2)+...+(81)/(32)

Of how many terms is , (55)/(72) the sum of the series (2)/(9) -(1)/(3)+(1)/(2)- .... ?

The sum of the series (2)/(3) + (8)/(9) + (26)/(27) + (80)/(81) + … to n terms is

The sum of the series (2)/(3)+(8)/(9)+(26)/(27)+(80)/(81)+ to n terms is n-(1)/(2)(3^(-n)-1)(b)n-(1)/(2)(1-3^(-n))(c)n+(1)/(2)(3^(n)-1)(d)n-(1)/(2)(3^(n)-1)

Find the sum of the following geometric series: (2)/(9)-(1)/(3)+(1)/(2)-(3)/(4)+rarr5 terms

Sum of the series 1-2((1)/(3.5)+(1)/(7.9)+(1)/(11.13)+......) is

The sum of the series 1+ (2)/(3)((1)/(8)) + (2 xx 5 xx 8)/(3 xx 6 xx 9) ((1)/(8))^(3) +… is