log4(3)+log8(3)=log2(6)+log2(9)=6log2+9log2=15log2PS:log4(3)是4的3次方再log的意思吧。
log4(3)+log8(3) =（1/2）log2(3)+（1/3）log2(3) =（5/6）log2(3)
log4(3)+log8(3)=log2(3)/2+log2(3)/3=5log2(3)/6
