lg25+(2/3)lg8+lg5.lg20+(lg2)^2

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 20:06:52
lg25+(2/3)lg8+lg5.lg20+(lg2)^2
x)I7207II7hkI8#"}BJ laHPXH0BԨYCՁA"e*B6yv DF

lg25+(2/3)lg8+lg5.lg20+(lg2)^2
lg25+(2/3)lg8+lg5.lg20+(lg2)^2

lg25+(2/3)lg8+lg5.lg20+(lg2)^2
lg25+(2/3)lg8+lg5.lg20+(lg2)^2
=2lg5+2lg2+lg5(1+lg2)+(lg2)²
=2+lg5+lg5lg2+lg²2
=2+lg5+lg2
=2+1
=3