log2(3)=1+log2(3/2)
log3(4)=1+log3(4/3)0
log3(4)>0
log2(3)/log3(4)=lg3/lg2/(lg4/lg3)=lg²3/(lg2lg4)
lg2lg4log3(4)
比较大小 log2（3）log3(4)
log2(3)=1+log2(3/2)
log3(4)=1+log3(4/3)0
log3(4)>0
log2(3)/log3(4)=lg3/lg2/(lg4/lg3)=lg²3/(lg2lg4)
lg2lg4log3(4)