MA14-03 Maths Watch
Formal Function Notation: Domain and Range
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In this lesson
In this video you'll learn about domain and range for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to use formal function notation to find composite and inverse functions, and check a solution against a stated domain restriction.
What it covers
- 1:09 Domain and range: the map, the words, the notation
- 4:03 Composite, solve, sieve
- 7:01 Inverses run the whole thing backwards, and that changes which values are allowed in the front door
- 9:43 Exam technique
Key words
For: Edexcel IGCSE 4MA1, Cambridge IGCSE 0580
On the specification
| Board | Spec | Statement |
|---|---|---|
| Edexcel IGCSE 4MA1 | H3.2A | Understand the concept that a function is a mapping between elements of two sets |
| Edexcel IGCSE 4MA1 | H3.2B | Use function notations of the form f(x) = ... and f : x → ... |
| Edexcel IGCSE 4MA1 | H3.2C | Understand the terms 'domain' and 'range' and which values may need to be excluded from a domain |
| Edexcel IGCSE 4MA1 | H3.2D | Understand and find the composite function fg and the inverse function f⁻¹ |
| Cambridge IGCSE 0580 | E2.13 | Understand functions, domain and range and use function notation. |
For teachers
This GCSE Maths lesson teaches formal function notation: domain and range. By the end, students should be able to use formal function notation to find composite and inverse functions, and check a solution against a stated domain restriction. It works through two worked examples and the mistakes examiners report.