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Chapter 2 Functions
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?
