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The set of permitted input values is the [ ].
A
Different inputs can give the same output, such as f(2)=f(−2)f(2)=f(-2)f(2)=f(−2).
B
The set of permitted input values is the domain.
C
f−1(x)f^{-1}(x)f−1(x) is the inverse function; 1f(x)\frac{1}{f(x)}f(x)1 is the reciprocal.
D
A function is one-to-one if f(a)=f(b)f(a)=f(b)f(a)=f(b) implies a=b\boxed{a=b}a=b.
Card 1 of 23
3.1.5 Algebra and functions (A-level only) Flashcards
23 flashcards on CCEA A Level Maths 3.1.5 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.