NDA Math Sequences and Series

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Question : 53 of 79

Marks: +1, -0

What is the sum of the series 0.3+0.33+0.333+......n terms?

[NDA I 2017]

‌‌
1
3
[n−‌‌
1
9
(1−‌‌
1
10n
)]
‌‌
1
3
[n−‌‌
2
9
(1−‌‌
1
10n
)]
‌‌
1
3
[n−‌‌
1
3
(1−‌‌
1
10n
)]
‌‌
1
3
[n−‌‌
1
9
(1+‌‌
1
10n
)]

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