- New reading assignment: finish section 1.2
- You have an assignment due Friday -- how's that coming?
- Last time:
- Functions and associated definitions: onto, 1-1, graph
- Functions
- Why functions are so useful:
- A function's graph -- subset of the Cartesian product
, where
- Example: the function
.
How can we characterize this function? What do we know about it?
- Inverses
- When defined.
- What if not defined?
- Let's take a look at Theorem 1-2, and prove part (b) (Problem 17 -- anyone looking at that one?).
- Why functions are so useful: