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(2+1)(2²+1)(2四次方+1)……(2n次方+1)
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(2+1)(2²+1)(2四次方+1)……(2n次方+1)
=(2-1)(2+1)(2²+1)(2四次方+1)……(2n次方+1)
=(2²-1)(2²+1)(2四次方+1)……(2n次方+1)
=(2四次方-1)(2四次方+1)……(2n次方+1)
=(2八次方-1)……(2n次方+1)
...........
=(2n次方-1)(2n次方+1)
=2的2n次方-1
=(2-1)(2+1)(2²+1)(2四次方+1)……(2n次方+1)
=(2²-1)(2²+1)(2四次方+1)……(2n次方+1)
=(2四次方-1)(2四次方+1)……(2n次方+1)
=(2八次方-1)……(2n次方+1)
...........
=(2n次方-1)(2n次方+1)
=2的2n次方-1
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