作业帮lg5·lg20+(lg2)^2
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/16 23:20:20
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lg5·lg20+(lg2)^2
lg5·lg20+(lg2)^2
lg5·lg20+(lg2)^2
lg5·lg20+(lg2)^2=（lg10-lg2）*（lg10+lg2）+(lg2)^2
=（1-lg2）*（1+lg2）+(lg2)^2
=1
=lg5(lg2+lg5+lg2)+lg2*lg2=lg5*lg2+lg5*lg5+lg2*lg2+lg5*lg2=lg5(lg2+lg5)+lg2(lg2+lg5)=lg5+lg2=1
lg5·lg20+(lg2)^2
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
（lg2)^2+lg5·lg20-1=?
lg2*lg50+lg5*lg20-2lg5*lg2
lg5^2+lg4+lg5*lg20+(lg2)^2
(lg2)^2+lg20*lg5+(lg5)^2
lg5^2+lg4+lg5*lg20+(lg2)^@
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2
lg2·lg50-lg5·lg20-lg4
(lg2)^2 lg5×lg20－1
lg5*lg20+(lg2)^
lg2*lg2+lg20*lg5=?
lg5^2+2/3lg8+lg5*lg20+lg2^2
lg5^2+lg8^2/3+lg5*lg20+(lg2)^2=?
（lg5)平方+2/3lg8+lg5乘lg20+（lg2)平方
lg5²+2/3lg8+lg5*lg20+(lg2)²
lg5²+2/3lg8+lg5×lg20+(lg2)²