找规律,2,1,5,7,17,(),(),127
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找规律,2,1,5,7,17,(),(),127
![找规律,2,1,5,7,17,(),(),127](/uploads/image/z/16744191-15-1.jpg?t=%E6%89%BE%E8%A7%84%E5%BE%8B%2C2%2C1%2C5%2C7%2C17%2C%EF%BC%88%EF%BC%89%2C%EF%BC%88%EF%BC%89%2C127)
规律是2^(N-1)+(-1)^(N-1)
2=2^0+1
1=2^1-1
5=2^2+1
7=2^3-1
17=2^4+1
...
127=2^7-1
所以括号内应该填入2^5-1=31,和2^6+1=65
2,1,5,7,17,(31),(65),127
2=2^0+1
1=2^1-1
5=2^2+1
7=2^3-1
17=2^4+1
...
127=2^7-1
所以括号内应该填入2^5-1=31,和2^6+1=65
2,1,5,7,17,(31),(65),127