(3+1)(x²+1)(3的4次方+1)(3的8次方+1)
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![(3+1)(x²+1)(3的4次方+1)(3的8次方+1)](/uploads/image/z/8823835-19-5.jpg?t=%283%2B1%29%28x%26%23178%3B%2B1%29%283%E7%9A%844%E6%AC%A1%E6%96%B9%2B1%29%EF%BC%883%E7%9A%848%E6%AC%A1%E6%96%B9%2B1%EF%BC%89)
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(3+1)(x²+1)(3的4次方+1)(3的8次方+1)
(3+1)(x²+1)(3的4次方+1)(3的8次方+1)
(3+1)(x²+1)(3的4次方+1)(3的8次方+1)
(3+1)(3²+1)(3⁴+1)(3+1)
=½×2(3+1)(3²+1)(3⁴+1)(3+1)
=½(3-1)(3+1)(3²+1)(3⁴+1)(3+1)
用完全平方公式(a+b)(a-b)=a²-b²得到
=½(3²-1)(3²+1)(3⁴+1)(3+1)
连用公式,最后得到
=½(3-1)(3
+1)
=½(3-1)
=3/2-½