(log5 根号2 ×log7 9)\(log5 1\3×log7 4开3次方)

问题描述:

(log5 根号2 ×log7 9)\(log5 1\3×log7 4开3次方)

log52 /log5 3=log3 2
log7 3 /log72=log2 3