log(9)2=0.5log(3)2(log(3)2+log(9)2)=1.5*log(3)2log(4)3=0.5log(2)3log(8)3=1/3log(2)3log(4)3+log(8)3=5/6log(2)3(1.5*log(3)2)*(5/6log(2)3)=1.25log(3)2*log(2)3=1