已知log2[log4(log3x)]=log3[log5(log2y)]=0,求4更号x-y^1/5

log2[log4(log3x)]=0
log4(log3x)=1
log3x=4
x=3^4=81
同理
log5(log2y)=1
log2y=5
y=32
所以原式=4×9-2=34