(3+1)(3²+1)(3四次方+1)(3八次方+1)(3十六次方+1)

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(3+1)(3²+1)(3四次方+1)(3八次方+1)(3十六次方+1)
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(3+1)(3²+1)(3四次方+1)(3八次方+1)(3十六次方+1)
(3+1)(3²+1)(3四次方+1)(3八次方+1)(3十六次方+1)

(3+1)(3²+1)(3四次方+1)(3八次方+1)(3十六次方+1)
用平方差
原式=(3-1)(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/(3-1)
=(3^2-1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/2
=(3^4-1)(3^4+1)(3^8+1)(3^16+1)/2
=(3^8-1)(3^8+1)(3^16+1)/2
=(3^16-1)(3^16+1)/2
=(3^32-1)/2

原式=(3-1)(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/(3-1)
=(3^2-1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)/(3-1)
=(3^4-1)(3^4+1)(3^8+1)(3^16+1)/(3-1)
=(3^8-1)(3^8+1)(3^16+1)/(3-1)
=(3^16-1)(3^16+1)/2
=(3^32-1)/2