3/1?是1/3吧?
2lg2+lg1/3+1/2lg.36+1/3lg8
=lg2^2+lg1/3+lg36^(1/2)+lg8(1/3)
=lg4+lg1/3+lg6+lg2
=lg4*1/3*6*2
=lg16
=lg2^4
=4lg2