[f(x)]²＞f(x²)
(㏒x)²＞㏒x²
(㏒x)²-2㏒x＞0
㏒x(㏒x-2)＞0
㏒x＜0 或0㏒x＞2
∵㏒x＞0,∴㏒x＞2
x＞10²＝100
x∈﹙100,﹢∞﹚