The sum of the first 99 terms of the series `3/4+5/(36)+7/(144)+9/(400)+\ ddot` `(99)/(100)` (b) `(999)/(1000)` (c) `(9999)/(10000)` (d) 1

The sum of the first 99terms of the series (3)/(4)+(5)/(36)+(7)/(144)+(9)/(400)+backslash*(99)/(100) (b) (999)/(1000) (c) (9999)/(10000) (d) 1

The sum of the first 10 terms of the series 9+99+999 +….., is

The sum of the first 10 terms of the series 9+99+999+ . . . Is

The sum of the first 10 terms of the series (5)/(1.2.3)+(7)/(2.3.9)+(9)/(3.4.27)+….. is

The sum of the first 10 terms of the series (5)/(1.2.3)+(7)/(2.3.9)+(9)/(3.4.27)+….. is

Find the sum of first n terms of the series 1.3 + 2.5 + 3.7 + 4.9 +…..

What is sum to the 100 terms of the series 9+99+999+…?

The sum to n terms of the series 3.5+5.7+7.9+..........