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A valid function assigns [ ] to each permitted input.
A
The composition f∘gf\circ gf∘g is defined by (f∘g)(x)=f(g(x))\boxed{(f\circ g)(x)=f(g(x))}(f∘g)(x)=f(g(x)).
B
The domain is the set of permitted inputs, while the range is the set of produced outputs.
C
181818
D
A valid function assigns exactly one output to each permitted input.
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3.1.4 Algebra and functions (A-level only) Flashcards
20 flashcards on CCEA A Level Maths 3.1.4 Algebra and functions (A-level only): the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.