JCHL Sets
Sets are about sorting things into groups. Venn diagrams, unions and intersections — a friendly place to start the course.
Your progress through this topic0 of 8 lessons
Lessons in this topic
All 8 lessons, in order — each one ticks off as you open it.
1Introduction to Sets2Union and Intersection3Set Difference and Complement4Subsets5Cardinal Number6Commutative Property7Associative Property8Set Problems
Key ideas in this topic
Every formula from these lessons in one place. The green ones are printed in the log tables booklet you get in the exam — the red ones you learn off.
★ Must learn
Everything that is in A OR B (or both).
JCHL Sets 2
★ Must learn
Only the overlap — elements in BOTH A and B.
JCHL Sets 2
★ Must learn
The elements that are in A but NOT in B.
JCHL Sets 3
★ Must learn
Everything in the universal set that is NOT in A.
JCHL Sets 3
★ Must learn
Every set has two improper subsets: the set itself, and the null (empty) set ∅.
JCHL Sets 4
★ Must learn
A set with n elements has 2ⁿ subsets in total (including itself and ∅).
JCHL Sets 4
★ Must learn
The NUMBER of elements in a set — the answer is just a number, not a set.
JCHL Sets 5
★ Must learn
Order does not matter for union and intersection.
JCHL Sets 6
★ Must learn
Where you put the brackets does not matter for union and intersection.
JCHL Sets 7