Functions | Domain, Range, Inverse, Composite | Complete IGCSE & O Level Math Guide

Ace your IGCSE and O Level Math exams with this full Functions guide!
In this video, we cover everything you need to master Functions for your 2025 Cambridge exams, including Domain, Range, Inverse Functions, and Composite Functions — explained in a simple, step-by-step way.

This video is perfect for:
• Cambridge IGCSE Mathematics (0580)
• Cambridge O Level Mathematics (4024)
• Other international O Level boards

What you’ll learn:
• How to find the Domain and Range in functions
• How to find Inverse Functions
• How to solve Composite Functions (f o g)(x)


Whether you’re revising for Paper 2, Paper 4, or just starting Functions, this lesson will boost your confidence!

Timestamps:
00:00 - Introduction to Functions for IGCSE/O Level
01:15 - Understanding What a Function Is
12:10 - Domain and Range Basics
40:50 - Inverse Functions Explained
1:00:30 - Composite Function Examples

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