log[3^0.5]2=alg2/lg[3^0.5]=alg2/[0.5lg3]=alg2/lg3=0.5alog[12]3=lg3/lg12=lg3/[lg4+lg3]=lg3/[2lg2+lg3]=lg3/[2*0.5alg3+lg3]=1/[a+1]