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Question

The side length of the square whose area is equal to the 7th term of the sequence 2,8,4,, is 
  1. 3
  2. 4
  3. 5
  4. 6


Solution

The correct option is B 4
Given sequence 2,8,4, is a G.P., whose common ratio is r=2
7th term is
T7=ar6=2(2)6=16

Therefore, the side length of the square is 4.

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