已知log5(3)=a,log5(4)=b.求:log25(12)
已知log5 (3)=a,log5(4)=b ,用a,b表示log5(24)
已知log5为底3的对数=a,log5为底2的对数=b,求log25为底12的对数的值
(log5根号2*log49 81)/(log25 1/3*log7 4开3次方)=?
log4(log5 a)=log3(log5 b)=1,求a/b.
a=log5(4),b=[log5(3)]²,c=log4(5),比较abc的大小
(log4 3+log8 3)(log3 5+log9 5)(log5 2+log25 2)=
已知log4(27)=a,log5(2)=b,求lg2及lg3
lg2=a,lg3=b,那么log5(12)=?
lg2=a,lg3=b,则log5 12=?
若lg2=a,lg3=b,则log5 12
log2/27及 log 3=a log5=b
设a=log5(4),b={log5(3)}^2,c=log4(5),则abc的大小关系是?要详解