3.2 Function notation

Understand a function as a mapping between elements of two sets.

use function notation in the forms f(x) = … and f : x ↦ …

understand domain and range, including values excluded from a domain, such as x = 2 for f(x) = 1/(x − 2)

understand and find the composite function fg and the inverse function f⁻¹; fg means apply g first, then f