Checkpoint 3

1. What is the domain of the function `f(x)=1/(2-x)` in Example 3?
2. What is the domain of `f^-1(x)=2-1/x`?
3. How is the domain of `f^-1` related to the set of values of `f`?
4. How is the domain of `f` related to the set of values of `f^-1`?