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left parenthesis 666 horizontal ellipsis text n digits end text right parenthesis squared plus left parenthesis 888 horizontal ellipsis n digits )=

  1. fraction numerator 4 over denominator 9 end fraction open parentheses 10 to the power of n end exponent minus 1 close parentheses    
  2. fraction numerator 4 over denominator 9 end fraction open parentheses 10 to the power of 2 n end exponent minus 1 close parentheses    
  3. fraction numerator 4 over denominator 9 end fraction open parentheses 10 to the power of n end exponent minus 1 close parentheses to the power of 2 end exponent    
  4. none of these    

The correct answer is: fraction numerator 4 over denominator 9 end fraction open parentheses 10 to the power of 2 n end exponent minus 1 close parentheses

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