计算(log3(2))*(log2(6-1))=?__________尤其是(log2(6-1))=?

计算log2 6-log2 3,lg5+lg2,log5 3+log5 1/3,log3 5-log3 15 log2(3)+log3(5)+log3(2)=? log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2[log log2 3×log3 7=log2 7 log2(2)+log5(1)-log1/3(1/27)+[3^log3(5)]^2+3^-log3(2)=? 若a=log2 3.b=log3 2,c=log1/3 2.d=log2 1/3 log2(3)*log3(4)*log4(5)*.log(k+1)(k+2)=log2(k+2) 怎么证 计算：lg(1/2)-lg(5/8)+lg(12.5)+log2为底3*log3为底8= 3+log2-7/1+log2-7=3+log3-7×log2-3/1+log3-7×log23 前者是怎么变成后者的? 若a=log2 3,b=log3 2,c=log4 6比较大小 log3 7·log2 9·log49 a=log4 1/2,则a= 解方程log2(4^x+1)=x+log2(2^(x+3)-6)