8√3/9
=2^3*3^1/2÷3^2
=2^3*3^(-3/2)
=3^(-3/2)/2^(-3)
=3^(-3/2)/4^(-3/2)
=(3/4)^(-3/2)
所以原式= log3/4[(3/4)^(-3/2)]=-3/2