Let U be an open subset of ℂ and f ∶ U → ℂ be an analytic function. Then which of the following is true?
1
If ƒ is one-one, then ƒ (U) is open in ℂ
2
If f is onto, then U = ℂ.
3
If f is onto, then f is one-one
4
If ƒ is one-one, then ƒ (U) is not open in ℂ