Chatty reference · maths1 week 5
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2026-08-16T00:00:00.000Z
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5. Maths Week 5 — Functions
Official topics include horizontal/vertical line tests, exponential functions, composite functions and inverse functions. citeturn1view0
Concepts
- Function as mapping
- Domain
- Range
- Vertical line test
- Horizontal line test
- One-to-one behaviour
- Exponential functions
- Composition
- Inverse functions
Composition:
(f∘g)(x)=f(g(x))
Inverse:
f−1(f(x))=x
Patterns
- Is this graph a function?
- Is this function one-to-one?
- Compute f(g(x)).
- Compute g(f(x)).
- Determine domain restrictions.
- Find inverse.
- Verify inverse.
- Distinguish function from inverse relation.
Classic trap
f(g(x))=g(f(x))
in general.