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

If the sum of the first n terms of the series

Find the sum of the first 28 terms of the series.

The sum to n terms of the series 9 + 99 + 999 + ……. Is

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

.The sum to 'n' terms of the series 9 + 99 + 999 ... ... is ] , [ 1) (10 ( 10^ n − 1 ) − n) 2) (10/ 9 [ 10^ n − 1 ] + n) 3) (10/ 9 [ 10^ n − 1 ] − n) 4) (10/ 9 [ 10^ n − 1) ]

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

The sum of the first 2012 terms of a geometric progression is 200. The sum of the first 4024 terms of the same series is 380. Find the sum of the first 6036 terms of the series.

" If 1,(2)/(3),(4)/(9),..... are in G.P then the sum of first 10 terms of the series is "