题目内容
设f(x)=则f(f(2))的值为
A.0
B.1
C.2
D.3
f(f(2))=f(1)=2,故选C.
设f(x)=则f[f(2)]的值为
0
1
2
3
设f(x)=则f[f(3)]=
C.
D.-2
设f(x)=则f(f(-2))=________.
设f(x)=则f{f[f(-)]}的值为________,f(x)的定义域是________.