(5+6)(5^2+6^2)(5^4+6^4)…(5^64+6^64) 急
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(5+6)(5^2+6^2)(5^4+6^4)…(5^64+6^64) 急
(5+6)(5^2+6^2)(5^4+6^4)…(5^64+6^64) 急
(5+6)(5^2+6^2)(5^4+6^4)…(5^64+6^64) 急
(5+6)(5^2+6^2)(5^4+6^4)…(5^64+6^64)
=(6-5)(5+6)(5^2+6^2)(5^4+6^4)……(5^64+6^64)
=-(5^2-6^2)((5^2+6^2)(5^4+6^4)……(5^64+6^64)
=-(5^64-6^64)(5^64+6^64)
=-(5^128-6^128)
=6^128-5^128