log3*2/log9*4=?

显示全部楼层 · 2011-10-24 22:03:09

1)没有括号：log3*2/log9*4=(log3)*2/(log9)*4=(log3^2)/(log9)*4=(log9)/(log9)*4=42)可能1：log(3*2)/log(9*4)=log(6)/log(36)=log(6)/log(6^2)=log(6)/[2log(6)]=1/23)可能2：log3*2/(log9*4)=(log3)*2/(4log3^2)=2log3/(8log3)=log3/(4log3)=1/4....................

千问 · 2011-10-24 22:03:09

log6/log36=lg6/36=lg1/6=-lg6...