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if 1+ 10 + 10 square +...........up to n terms is equals to 10 raise to n  -1/9, then the sum of the series of 4+ 44+444+........... up to n terms is  [ 4/9(10 raise to n -1)- 4/9n,   4/81(10 raise to n-1)- 4/9n,   40/81(10 raise to n-1)-4n/9,  40/9(10 raise to n-1)- 4n/9, 40/81(10 raise to n-1).                       sir please answer it in simple way                 

Asked by Rony Joseph | 03 Apr, 2014, 06:18: PM
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Answered by | 04 Apr, 2014, 01:09: PM

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