作业帮lg²2+ lg2*lg5+ lg5的值
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/17 03:43:05
x)IWS646VI7I71Ljyڰ&H
;
LEO @!MmTtC!deh_\gu
c 72H)npEh\lȍ(BXP
6-|>ٌ3\4CAA6vX/ۻhxHW(
lg²2+ lg2*lg5+ lg5的值
lg²2+ lg2*lg5+ lg5的值
lg²2+ lg2*lg5+ lg5的值
lg²2+ lg2*lg5+ lg5
=lg2×(lg2+lg5)+lg5
=lg2×lg10+lg5
=lg2+lg5
=lg10
=1
=(lg2+lg5)^2-lg2lg5-lg5lg5+lg5
=1-(lg2+lg5)lg5+lg5
=1-lg5+lg5
=1
lg²2+ lg2*lg5+ lg5=lg2(lg2+lg5)+lg5=lg2*lg10+lg5=lg2*1+lg5=lg2+lg5=lg10=1
没看明白题 用汉语解释一下吧