What defines a function compared to a general mapping?
It gives exactly one input for each allowed output.
It gives at least one output for each allowed input.
It gives different outputs for all allowed inputs.
It gives exactly one output for each allowed input.
Flashcards for Edexcel A Level Maths Functions and Graphs, covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 22 cards drawn from 2.1 The Modulus Function, 2.2 Functions and Mappings, 2.3 Composite Functions, 2.4 Inverse Functions, 2.5 y=|f(x)| and y=f(|x|), 2.6 Combining Transformations, and 2.7 Solving Modulus Problems, matched to the Edexcel A Level Maths (9MA0) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.
