Answer:
1) yes
2) No
3) No
4) yes
5) No
Step-by-step explanation:
1) f(0)=0, f(1)=1, f(2)=2, f(3)=3, then
2) f(0)=0, , then f(1)=1; , then f(2)=0; , then f(3)=1
Then , this means that f isn't onto.
3.
- , then f(1)=0
- , then f(2)=2
- , then f(3)=2
Then , this means that f isn't onto.
4. , then f is onto.
5. , this means that f isn't onto.