2 lg2 + lg5 / lg√10
问题描述:
2 lg2 + lg5 / lg√10
答
2 lg2 + lg5 / lg√10
=2 lg2 + lg5 / lg(10)^(1/2)
=2 lg2 + lg5 /[(1/2)* lg(10)]
=2 lg2 + lg5 /[(1/2)*1]
=2 lg2 + 2lg5
=2(lg2*5)
=2lg10
=2*1
=2