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Unit 4 of 17
Functions
The organizing concept.
Every topic follows the curriculum standard
Learn→See→Try→Explain→Verify→Challenge→Transfer→Master
Topics in this unit
5 topics. Each card opens a full topic workspace and supports all eight learning actions.
Function Definition
Exactly one output per input
Function Notation
f(x) as language
Domain & Range
Admissible values
Evaluating & Interpreting
Meaning in context
Three-pathway connections
Study this unit at three depths — current-grade mastery, advanced thinking, and competition mathematics.