(lg5)²+lg2×lg50

来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/22 19:11:12
(lg5)²+lg2×lg50(lg5)²+lg2×lg50(lg5)²+lg2×lg50(lg5)²+lg2×(lg5+lg5+lg2)=(lg5)²

(lg5)²+lg2×lg50
(lg5)²+lg2×lg50

(lg5)²+lg2×lg50
(lg5)²+lg2×(lg5+lg5+lg2)
=(lg5)²+2lg2×lg5+(lg2)^2
=(lg2+lg5)^2=(lg10)^2=1