Question 477559
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Hi,
3(2)^(n+1)-3(2)^n=24 
(2)^(n+1)-(2)^n = 8

 2^(n+1)/2^n - 2^n/2^n = 8/2^n   |dividing each term by 2^n
    2 - 1 = 8/2^n
        1 = 8/2^n
       2^n = 8
          n = 3