Mathematics, 12.01.2020 11:31, bryanatwin6207

How many of the first 80 positive integers can he written as the sum of two distinct powers of 3? for example, 28=27+1=3^3+3^0 can be expressed, but 29 cannot be.

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How many of the first 80 positive integers can he written as the sum of two distinct powers of 3? f...