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-   -   Find the sum of the first n term (https://www.askmehelpdesk.com/showthread.php?t=599074)

  • Sep 26, 2011, 09:06 PM
    sriyak
    Find the sum of the first n term
    Find the sum of the first n term (I)3+33+333...
    (ii)4+44+444...
  • Sep 26, 2011, 11:10 PM
    Unknown008
    You can write it down as:

    (3 x 1) + [(3 x 10) + (3 x 1)] + [(3 x 100) + (3 x 10) + (3 x 1)] +... + [(3 x 10^n) + (3 x 10^(n-1)) +... + (3 x 1)]

    And same for the other.

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