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Question

Find the value of the following expression upto four places of decimals
  1+ 1 1 x 2 + 1 1 x 2 x 4 + 1 1 x 2 x 4 x 8 + 1 1 x 2 x 4 x 8 x 16      

Options:
A .  1.6414
B .  1.6415
C .  1.6416
D .  1.6428
E .  None of these
Answer: Option C
 -   Given expression = 2 x 4 x 8 x 16 + 4 x 8 x 16 + 8 x 16 + 16 +1 2 x 4 x 8 x 16           Given expression = 1024 + 512 + 128 + 16 + 1 1024 = 1681 1024  = 1.6416  

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