Question

已知f(x)=|log₂x|,当0

Answer 1

2.5>1,f(2.5)=|log(2)2.5|=log(2)2.5

f(a)>f(2.5)

∴|log(2)a|>log(2)(2.5)

等价于

{0log(2)2.5 { log(2)a>log(2)2.5

{0