Page 10 - 091math-wb-w3-(sets)

WORKBOOK

Example 9: Match the set on the left with the type of set on the right.

Sets Type of Sets

a) A={x: -5<x<5, x is a real number}

b) B {...,   3, 2, 1,0,1,2,3,...} Finite

c) C={x: x<100, x is a natural number}

d) D 1,2,3,4  Infinite

e) E={flying elephants}
Empty
f) F={integer whose squares are negative}

g) G={days of the week}

UNIVERSAL SET:
………………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………………

Example 10: Here are some examples about universal set.



1) A = x x is a river in East- Anatolia

 x x is a river in Anatolia 
U=

2) A   x x  8 0, x N   0,1,2 
2

U 0,1,2,3,...,n,... 

REMARK: In general, universal sets are represented by a rectangle.

10 091math-wb-w3-(sets)