用乘法公式计算 1999^2-2000*1998
问题描述:
用乘法公式计算 1999^2-2000*1998
计算(2+1)(2^2+1)(2^4+1)...(2^32+1)写出计算步骤
答
1999^2-2000*1998
=1999²-(1999+1)(1999-1)
=1999²-1999²+1
=1
(2+1)(2^2+1)(2^4+1)...(2^32+1)
=(2-1)(2+1)(2^2+1)(2^4+1)...(2^32+1)
=(2^2-1)(2^2+1)(2^4+1)...(2^32+1)
=(2^4-1)(2^4+1)...(2^32+1)
=……
=(2^32-1)(2^32+1)
=2^64-1