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

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(log5根号2*log4981)/(log251/3*log74开3次方）=?(log5根号2*log4981)/(log251/3*log74开3次方）=?(log5根号2*log4981)/(l

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

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