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GATE2013 EE: GA-10

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Find the sum to $'n'$ terms of the series $10+84+734+\dots$

  1. $\frac{9(9^n+1)}{10} +1$
  2. $\frac{9(9^n-1)}{8} +1$
  3. $\frac{9(9^n-1)}{8} +n$
  4. $\frac{9(9^n-1)}{8} +n^2$
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