Five marks exercise problems I — task. Mathematics State Board, Class 10.

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Find the sum to

$n$ terms of the series.

$0.4 + 0.44 + 0.444 + …$ to

$n$ terms

The sum of the series

$=$

$\frac{i}{i} i - \frac{i}{i} (i - {(\frac{i}{i})}^{i})$

[Note: Enter coefficients and variables in separate boxes.]

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