Stage 19 · Sets & Intervals — the Language of Functions
19.5.5 Expressing Operation Results as Intervals
19.5 Intervals and Neighborhoods: Sets on the Number Line
Point 5 of 5
19.5.5 Expressing Operation Results as Intervals
Core ideaOn the number line, intersecting and uniting two stretches is just overlapping and joining intervals — a warm-up for function domains.
Module goal. Carry the language of sets onto the number line, using intervals and neighborhoods to capture continuous ranges of numbers neatly — a direct route to the domain of a function