Let Sn (1 n 9) denotes the sum of n terms of series 1 + 22 + 333

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Let Sn (1 n 9) denotes the sum of n terms of series 1 + 22 + 333 + ... + 999999999, then for 2 ≤ n ≤ 9
A


B


C
9(Sn – Sn–1) = n(10n – 1)

D
None of these
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