计算:4lg1+lg2.5+lg4-(1/2)lg10^2

问题描述:

计算:4lg1+lg2.5+lg4-(1/2)lg10^2

lg1=0
(1/2)(lg10)^2=lg10=1
所以
4lg1+lg2.5+lg4-(1/2)(lg10)^2
=0+lg2.5*4-1
=0