lg5*lg20+(lg2)^_数学解答

lg5*lg20+(lg2)^

人气：248 ℃　时间：2020-03-22 17:13:37

解答

lG(5)*LG(20)+(LG(2))^2
=LG(5)*(LG(4)+LG(5))+(LG(2))^2
=(lG(5))^2+2LG(5)*LG(2)+(LG(2))^2
=(LG(5)+LG(2))^2
=(LG(10))^2=1