Five mark example problems II — task. Mathematics State Board, Class 10.

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Find the sum to \(n\) terms of the series \(5 + 55 + 555 + …\)

Answer:

The sum of the series \(=\)

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

[Note: Enter the numbers and variables in separate boxes.]

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14. Five mark example problems II