2log3(1/2)+log3(12)-(0.7)^0+0.25^-1 0
问题描述：
2log3(1/2)+log3(12)-(0.7)^0+0.25^-1 0
答
=log3(1/2)^2+log3(12)-1+4
=log3[(1/4 )*12]-1+4
=log3(3)-1+4
=1-1+4
=4