题目内容：

(log5根号2*log49 81)/(log25 1/3*log7 4开3次方）=?

优质解答

(log5根号2*log49 81)/(log25 1/3*log7 4开3次方）=(1/2log5 2*log7 9)/(1/2log5 1/3*1/3log7 4）=—3