x
1
2
3
f(x)
g(x)
则f[g(1)]的值为__________;满足f[g(x)]>g[f(x)]的x的值是__________.
答案:1 2
解析:f[g(1)]=f(3)=1, ∵f[g(x)]>g[f(x)], ∴g(x)=2.∴x=2.