(1+2)(1+2²)(1+2³)…(1+2³²)=?
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(1+2)(1+2²)(1+2³)…(1+2³²)=?
(1+2)(1+2²)(1+2³)…(1+2³²)=?
(1+2)(1+2²)(1+2³)…(1+2³²)=?
首先:
(1+2)(1+2^2)(1+2^4)(1+2^8)(1+2^16)(1+2^32)
=(2-1)(2+1)(2^2+1)(2^4+1)((2^8+1)(2^16+1)(2^32+1)
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)
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=(2^64-1)