Find the sum of the following series up ...

Find the sum of the following series up to n terms:
(i) `5+55+555+......` (ii) `.6+.66.+.666+.............`

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The correct Answer is:

(i) `50/81(10^n-1)-(5n)/9` (ii) `(2n)/3-(2)/27(1-10^(-n))`

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