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# SETS

CONTENT

1. Set Operations
2. Union of Sets
3. Intersection of Sets
4. Complement of a Set
5. Venn Diagrams
6. Application of Venn Diagram up to 3 Set Problems

## Operations on Sets

### The Union of Sets

The Union of Sets A and B is the Set that is formed from the elements of the two Sets A and B. This is usually denoted by “A ⋃ B” meaning A Union B. Thus A ⋃B is the Set which consists of elements of A or of B or of both A and B.

When represented using Venn diagram we have
A ⋃B

Using Set notations, the Union of two Sets A and B is solved as follows

Example 1:

Given that A = {3, 7, 8, 10}

and B = {3, 5, 6, 8, 9} then

A B= {3, 5, 6,7, 8, 9,10}

Example 2:

If A = {a, b, c, d}, B = {1, 2, 3, 4} and C = {a, 3, θ} Then A ⋃B ⋃C = {a, b, c, d,1, 2, 3, 4, θ}

Class Activity

A = {7, 8, 9, 10}, B = {8, 10, 12, 14} and C = {7, 9, 10, 14.

Lesson tags: General Mathematics Lesson Notes, General Mathematics Objective Questions, SS1 General Mathematics, SS1 General Mathematics Evaluation Questions, SS1 General Mathematics Evaluation Questions First Term, SS1 General Mathematics First Term, SS1 General Mathematics Objective Questions, SS1 General Mathematics Objective Questions First Term
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