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很明显,本题不是用乘法公式算的,而是平方差公式
2×(3+1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3-1)(3+1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3²-1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3⁴-1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^8 -1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^16 -1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^32 -1)(3^32+1)(3^64 +1)+1
=(3^64 -1)(3^64 +1)+1
=3^128 -1+1
=3^128
2×(3+1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3-1)(3+1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3²-1)(3²+1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3⁴-1)(3⁴+1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^8 -1)(3^8+1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^16 -1)(3^16+1)(3^32+1)(3^64 +1)+1
=(3^32 -1)(3^32+1)(3^64 +1)+1
=(3^64 -1)(3^64 +1)+1
=3^128 -1+1
=3^128
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