(lg5)²+lg2×lg5+lg2
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/06 07:53:41
(lg5)²+lg2×lg5+lg2
(lg5)²+lg2×lg5+lg2
(lg5)²+lg2×lg5+lg2
原式=lg5×(lg5+lg2)+lg2
=lg5×lg10+lg2
= lg5+lg2=lg10=1
(lg5)²+lg2×lg5+lg2
(lg5)²+lg2×lg5+lg2
(lg5)²+lg2×lg5+lg2
原式=lg5×(lg5+lg2)+lg2
=lg5×lg10+lg2
= lg5+lg2=lg10=1