求(lg2)^2+lg2lg5+log(3)5/log(3)10值 注:log(3)5是log以3为底
问题描述:
求(lg2)^2+lg2lg5+log(3)5/log(3)10值 注:log(3)5是log以3为底
答
(lg2)^2+lg2lg5+log(3)5/log(3)10
=(lg2)^2+lg2lg5+lg5
=lg2*(lg2+lg5)+lg5
=lg2*lg10+lg5
=lg2+lg5
=lg10
=1