log(x)4/5
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log(x)4/5log(x)4/5log(x)4/5log(x)4/5log(x)4/5当x>1，意味着函数单调增，于是x>4/5,于是合起来，x>1。于是解为01主要看单调性喔ln0.8/lnx(
log(x)4/5
log(x)4/5
log(x)4/5
log(x)4/5
log(x)4/5<1=lg(x)x.当0
于是解为0
主要看单调性喔
ln0.8/lnx<1
(1)若lnx>0，则ln0.8
(2)若lnx<0，则ln0.8>lnx
所以0
log(x)4/5
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