a>0,a^(2/3)=4/9,
log(1/4) a^(2/3)=log(1/4) 4/9
2/3*log(1/4)a=log(1/4)(2/3)^2
log(1/4)a=3/2*2log(1/4) (2/3)
=3log(1/4) (2/3)
=3(log(1/4)2 -log(1/4)3)
=-3/2(log2 2-log2 3)
=3/2*log2(3)-3/2
a>0,a^(2/3)=4/9,
log(1/4) a^(2/3)=log(1/4) 4/9
2/3*log(1/4)a=log(1/4)(2/3)^2
log(1/4)a=3/2*2log(1/4) (2/3)
=3log(1/4) (2/3)
=3(log(1/4)2 -log(1/4)3)
=-3/2(log2 2-log2 3)
=3/2*log2(3)-3/2