(2+1)(4+1)(16+1)(256+1)(65536+1)=?
问题描述:
(2+1)(4+1)(16+1)(256+1)(65536+1)=?
答
(2+1)(4+1)(16+1)(256+1)(65536+1)
=(2-1)(2+1)(4+1)(16+1)(256+1)(65536+1)
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)
=(2^4-1)(2^4+1)(2^8+1)(2^16+1)
=(2^8-1)(2^8+1)(2^16+1)
=2^32-1