解方程log7[log3(x)]=-1

问题描述:

解方程log7[log3(x)]=-1

log7[log3(x)]=-1
log7[log3(x)]=log7(1/7)
于是log3(x)=1/7
于是log3(x)=;og3[3^(1/7)]
于是x=3^(1/7)