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(2+1)(2²+1)(2的四次方+1)…(2的2n次方+1)=多少
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(2+1)(2²+1)(2^4+1)…(2^2n+1)
=(2-1)(2+1)(2²+1)(2^4+1)…(2^2n+1)
=(2²-1)(2²+1)(2^4+1)…(2^2n+1)
=(2^4-1)(2^4+1)…(2^2n+1)
=(2^8-1)…(2^2n+1)
........
=(2^2n-1)(2^2n+1)
=(2^4n-1)
=(2-1)(2+1)(2²+1)(2^4+1)…(2^2n+1)
=(2²-1)(2²+1)(2^4+1)…(2^2n+1)
=(2^4-1)(2^4+1)…(2^2n+1)
=(2^8-1)…(2^2n+1)
........
=(2^2n-1)(2^2n+1)
=(2^4n-1)
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