H2 Maths Notes (JC 1-2): 1.1) Functions

Q: What does H2 Maths Notes (JC 1-2): 1.1) Functions cover?
A: Domains, ranges, inverse checks, and composite workflows for Section A Topic 1.1 of the 2026 H2 Maths syllabus.

Before you revise
Keep a running list of domain restrictions (denominators, even roots, logarithms). Test every claim with quick substitutions or GC trace-functions questions are marked on precision.

Core Concepts

• A function $f: A \to B$ assigns each $x \in A$ to one output $f(x) \in B$