Focus Questions
- What is a function?
- What is the domain of a function?
- What is the difference between the range and codomain of a function?
- What does it mean for a function to be an injection? A surjection?
- When and how is the composite of two functions defined?
- When and how is the inverse of a function defined?
- What do we mean by the image and inverse image of a set under a function?
- What properties relate images and inverse images of sets and set unions?
