Math Out-Standing Student Problem#95

This is the problem sum of sequence. To solve this type of problem, you need to simplify the general term of it with spread it to become two other sequences factor order. As I did, I used the formula of a^2-1 =(a-1)(a+1) then inverse the equation. Then let a=3^(2^n) and the last section, I multiply both sides with 2^(n+1).

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