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  • 2011|Electronics and Comm (GATE Exam)-Previous Question Paper Solution
  • The sum of n terms of the series 4 + 44 + 444 + .... is
Multiple choice

The sum of n terms of the series 4 + 44 + 444 + .... is

  1. (4 /81) [10n+1 - 9n - 1] 

  2. (4 /81) [10n+1 - 9n - 1] 

  3. (4 / 81) [10n+1 - 9n - 10]

  4. (4/81) [10n - 9n - 10]

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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