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问题: 初二数学题

计算题
(2+1)(2^2+1)(2^4+1)...(2^64+1)+1
=

解答:

原式=(2-1)(2+1)(2^2+1)(2^4+1)...(2^64+1)+1
=(2^2-1)(2^2+1)……(2^64+1)+1
=……
=(2^64-1)(2^64+1)+1
=2^128