(3+1)(3平方+1)(3四次方+1)(3的八次方+1)
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![(3+1)(3平方+1)(3四次方+1)(3的八次方+1)](/uploads/image/z/814919-23-9.jpg?t=%283%2B1%29%283%E5%B9%B3%E6%96%B9%2B1%29%EF%BC%883%E5%9B%9B%E6%AC%A1%E6%96%B9%2B1%EF%BC%89%EF%BC%883%E7%9A%84%E5%85%AB%E6%AC%A1%E6%96%B9%2B1%EF%BC%89)
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(3+1)(3平方+1)(3四次方+1)(3的八次方+1)
(3+1)(3平方+1)(3四次方+1)(3的八次方+1)
(3+1)(3平方+1)(3四次方+1)(3的八次方+1)
(3+1)(3²+1)(3^4+1)(3^8+1)
=2×(3+1)(3²+1)(3^4+1)(3^8+1)÷2
=(3-1)(3+1)(3²+1)(3^4+1)(3^8+1)÷2
=(3²-1)(3²+1)(3^4+1)(3^8+1)÷2
=(3^4-1)(3^4+1)(3^8+1)÷2
=(3^8-1)(3^8+1)÷2
=(3^16-1)÷2
=½(3^16-1)