Form 4 Mathematics Chapter 3

Form 4 Mathematics

Chapter 3: Sets Concept of Set  Set : Collection or group of objects A = {1,4,5,7,8}  Є : ‘is an element of’

 ∉ : ‘is not an element of’

 Venn diagram

 n(A) : The number of element in set A

 Ø or { } : Empty set

Subset, Universal Set and the Compliment of a Set ⊂ : Subset

⊄ : Not a subset

Chapeter 3: Sets

Form 4 Mathematics

ξ : Universal set

A’ : The complement of set A

A⊂A and Ø ⊂A

If A ⊂ ξ, then A + A’ = ξ

Operations on Sets ∩ : Intersections of sets

∪ : union of sets

Chapeter 3: Sets

Form 4 Mathematics

Examples A∩B⊂A

A∩B⊂B

If A⊂B, then A∩B = A

Examples A⊂A∪B

B⊂A∪B

If A⊂B, then A∪B = B

Chapeter 3: Sets